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Fix Adobe Flash Player FullScreen.
Add or override the brightness slider to change the brightness via an alpha layer (and optionally stop using or cooperate with the exising backlight, if present).
Provide SSH search results in overview.
Put Gnome Tweaks in the System menu. Optionally, collapse Settings and Tweaks into a single button.
... or maybe not, and that's why the start day is configurable in the preferences.