Turning everything off gives GNOME back the desktop and tray icon extensions Steamify added

CHANGELOG.md

@@ -19,6 +19,7 @@ one per merged pull request.
 - **feat: a run that only needs a new GNOME login (the theme, no reboot) ends with a countdown on the done screen ("Restarting GNOME in 10 s", with Restart GNOME now and Cancel) and then logs in again by itself, the counterpart of KDE restarting plasmashell (GNOME Shell on Wayland is the compositor too and can't restart in place). A run that needs a reboot keeps "Restart now" (it loads GNOME fresh): before, the Restart GNOME button was hidden then, and nothing started by itself**
 - **fix: Restart GNOME logs in to GNOME: after the SteamOS conversion the account's session is gaming mode, and the relogin went there (a restart that took a minute: Steam starting in gaming mode). `steamify-gdm-relogin` takes the session to log in to (the one the app runs in) for this login only and puts the account's session, the one the next boot goes to, back once the new session is up**
 - **fix: turning the GNOME theme off also removes the dock's and tiling's settings schemas that were copied to `~/.local/share/glib-2.0/schemas` for GNOME Settings' panel (they stayed behind, for extensions that were gone). Desktop Icons NG and AppIndicator stay: they belong to the SteamOS conversion (the desktop shortcut and Steam's tray icon)**
+- **fix: turning everything off gives GNOME back what Steamify added for the desktop and tray icons: Desktop Icons NG and AppIndicator (and Extension Manager), which the SteamOS conversion and now the GNOME theme both need. When the last of the two is turned off, the two extensions leave the user's list of enabled extensions and the packages Steamify installed (noted in `gnomeextras.list` before installing, so packages the user had stay) are removed; while the other one is still on they stay, and are enabled again (the theme's undo puts back the list it found). Before, nothing removed them. The theme installs them itself too**
 
 ## 2.12.0 - 2026-10-13