Implemented

cinnamon new combo options for spices settings (combo options, valid values) sound applet: can now also mute input on middle-click next/previous track on right/left scroll album art keep aspect ratio sound volume can go all the way to 150% better CSD windows support: titlebar click actions and button layouts faster to map windows better window animations better window list thumbnails notifications: can be shown at the bottom of the screen close button no more fade-effect no longer vanish when focusing caller app ability to show desklets on top of windows thanks to show-desklets applet, or Super+Tab

nemo: symbolic icons faster view render stronger extension code File search: async search simplify UI/features

improvements to mint-y-icons improved icons backports from moka crisper HiDPI with @2x icons

xreader recent view preferences, optional toolbar buttons remove annotations epub support (thumbs fixed, allow to save document) thumbnail zoom smooth scrolling

xed refined look/feel with GTK 3.22 support shortcuts window new preference window (from xapps)

mintsources: PPA: show already installed packages

mintupdate: can be backported (locales ...) shortcut window timeshift integration replace levels/policy kernel install rely on meta automatic updates

mintwelcome: new layout

pia-manager: remembers username/password/gateway

docs translation guide troubleshooting guide

hidpi: 2x icons pkexec instead of gksu

Linux Mint 18.3

Release
    rel_notes
        Add instructions to upgrade to HWE Xorg 1.19

Maintenance

update cinnamon-translations

mintinstall:
    continue to show window-progress even when app page isn't visible
    install flatpak deps via API to better report progress
    keyboard navigation issues

mintreport:
    warn about root password if not set

Linux Mint 19

cinnamon:
    investigate https://www.phoronix.com/scan.php?page=news_item&px=GNOME-Post-3.28-Perf-Work

make the GOA frontend an Xapp (it should be cross-DE), disable buggy/irrelevant services

hidpi
    cinnamon startup apps icons are blurry

redshift
    doesn't die when logging out

Artwork
    would be nice if slick showed our release number
    remove preload of cinnamon themes

desktop-search:
    local files
    web engines
    recent
    apps
    dictionary
    translations

mintwelcome:
    write content and hint at things users might want to do (codecs, popular settings, popular apps etc..)

mintreport:
    detect missing l10n packages and hint at mintlocale

mintupdate:
    safeguard against package removals (for instance, don't let users perform updates which would remove sensitive packages).
    notice to reboot the computer when appropriate
    purge old kernels? https://github.com/Pjotr123/purge-old-kernels-2
    systray icon or infobar to notify user of new Mint versions
    new type to mark updates from other PPA/repos
    switch type icons to symbolics

system:
    compiler optimization: consider optimizing compiled binaries for Cinnamon/Xapps

cinnamon:
    cinnamon slow to start after boot --> delay execution of appsys/docinfo until the DE is loaded
    enable recent by default, fix mem leak https://github.com/linuxmint/cinnamon-desktop/commit/2015cc0f8a8fe46384225b0cf10df45f7d3d9315#diff-7ad95a88738c9b5cd253f469add87640

nemo:
    rubber banding issue: https://github.com/linuxmint/nemo/issues/1261
    Skip GVFS when possible
    Performance issues:
        File operations:
            Mouse-cursor lag
        Loading views:
            switching views is slower than reloading them
            existing thumbs are loaded asynchronously
            loading is slower than with ls (could be Gvfs, could be the way we render view in GTK. For 25k elements, 0.4s with ls, up to 6s in icon view for Nemo/Caja)
    video thumbnails are blurry

Roadmap

mate:
    switch mozo for menulibre

mintreport:
    dmesg errors
    foreign packages if pinned by mint
    wrong lsb info..etc.
    slow boot sequence
    slow shutdown sequence

implement an alarm clock

cinnamon:
    CSD: support mouse wheel speed? Evdev scrolling distance?
    menu keywords: looking for display in menu shows color first
    preferences > keyboard > custom shortcuts. Used with a Spanish keyboard layout. Recorded: crtl+number and ctrl+Shift+number (e.g. ctrl+1 and ctrl+shift+1 = ctrl+!) they are recorded correctly. When using the shortcut the command defined in the shift combination is triggered with just ctrl+number (i.e. ctrl+1). The complete combination triggers nothing (i.e. ctrl+shift+1 does nothing) and the comand defined in ctrl+number can never be used. This worked in 17.3.
    track/troubleshoot shutdown sequence (user should know what is happening when shutdown isn't immediate)
    track/troubleshoot vsync, compositing, unredirected windows and policy
    menu: consider adopting this layout (https://raw.githubusercontent.com/The-Panacea-Projects/Gnomenu/master/Screenshot.png), same as ours/mintmenu, only better.
    todo list applet/desklet
    calendar events applet/desklet
    multiple clocks https://github.com/simonwiles/cinnamon_applets
    network applet: airplane mode (quick way to rfkill all)
    nemo: retire computer:/// place (which is completely useless) or revamp it into something better
    alt-tab and panel use icon provided by appsys, ignoring icon set by the application itself (example: a python window using widow.set_icon_name())
    actions in panel launchers aren't translated if not present in .desktop file
    gnome-system-monitor moves out of place in Expo
    When using Cinnamon bar at top, and secondary monitor with higher height than the main display, some apps like KDE Apps (Krita, Kdenlive) or Wine Based Apps (teamviewer) will display menus from toolbar in the wrong place. Being more specific: The menus will be displayed in the position that they should be displayed at main monitor, however in this case the window is maximized in the secondary monitor.
    Is there any reason why there are two names for the same item, eg. "Trash" and "Rubbish Bin"? Would it be better to standardise on only one name?
    add gnome-screenshot to panel, right-click and select "Take screenshot of a selected area". This runs gnome-screenshot -a.. it should work but it doesn't. Is it because of the panel launcher capturing the click event or something?

xapps
    implement an app-sharing protocol to quickly move a document from one app to another

    gestures support:
        pinch:
            zoom document in pix
            zoom view in nemo

        swipe:
            previous/next document in pix

        scroll:
            sound-volume/seek in xplayer

        click:
            pause/resume in xplayer

        double-click:
            full-screen in xplayer
            full-screen in xviewer

    pix
        doesn't rotate videos when playing them
        vignettes should look better, and the same in all themes
        support prefer-dark-themes
        treeview in sidebar shows unecessary "(empty)" when dirs have no subdirs

artwork:
    Tray icons are black with mint-y themes.
    mint-x-icons: network status icons have a dark background in panel 33px and bigger (sound icon looks wrong in 41px and bigger).
    mint-y The maximize/restore window control button doesn’t change visually between in maximized and restored state (default theme and Mint-Y-Dark)

R&D

system
    consider enabling recommends

review logind.conf changes in:
    MATE
    Xfce

libindicator++?
    client-rendered icon/menu (ala libindicator)
    support all the features from GTK statusicon (tooltips, left/right clicks etc..)

network discovery:
    easy out-of-the-box interactions (messaging/presence/file-sharing) over the LAN

windows compatibility layer:
    seamless wine integration

HiDPI support:
    upstream apps using GTK2: Gimp, Hexchat, VLC, Pidgin, Tomboy.