[Window Manager] Show a thumbnail along with the window icon in the notification.
[Notification applet] Another camelCaseRefactoring regression.
[Message Tray] Check for pending notifications before acting. Plus some cleanup.
[Alt-Tab] Remove blinking for attention-seeking windows.
[Alt-Tab] Let window-handling keyboard shortcuts work also in non-persistent mode.

And let Ctrl+n toggle window-minimized (free up Ctrl+r for other purposes).
[Alt-Tab] In preview mode, show the application icon in the window's top-left corner.
[Alt-Tab] Unify key-pressed and key-released handling. Execute some actions on key-release instead of on key-press.

Actions that should not be repeated if a key is left pressed down
are best executed on key-release. Close-window is one example,
Zoom is another.
[Window Manager] Destroy notification if alerting window is detected by timer function to have focus.
[Alt-Tab] F2 closes Alt-tab and brings up the run dialog.
[Alt-Tab] Lower opacity on preview of minimized window.
[Alt-Tab] Simplify the keyboard shortcuts for a couple of non-destructive window actions.

Minimize/restore windows: 'n' only.
Move to next monitor: 'm' only.
[Alt-Tab] Add a shortcut to activate the selected window without leaving Alt-Tab.

The shortcut is 'a'. You can use it to change the window tablist-order without
immediately switching to a certain window.
[Alt-Tab] Overview of on-destroy cleanup.
[Expo] Toggle grid view on and off dynamically with Ctrl+g.
[Expo] (Minor) Treat forceOverviewMode consistently as a boolean.
[Expo] Add zoom-to-selected-workspace function, toggled by pressing 'z'.
[Alt-Tab] Enable direct switch to Scale or Expo directly from Alt-Tab.
[Expo] (Minor) Move a function definition.
[Expo] Unify key-press and key-release handling.
[Expo] Implement keyboard-controlled gradual zoom.

Ctrl+'+' (plus): Increase the zoom level.
Ctrl+'-' (minus):  Decrease the zoom level.
Ctrl+'0' (zero): Exit zoom.