- libgtk4-1 is not used by Signal and now it declares the libgtk3-0
as a dependency;
- Zenity is not needed as a file manager once Thunar is used;
- ATK is installed for Signal but not for any apps, remove until there
is a shared formula or pillar to install accessibility tools; and
- Ayatana AppIndicator for tray widget. Signal tray widget is buggy,
sometimes quitting doesn't quit and there is no configuration option
to start the tray, only command-line option. Because of these reasons,
not enabling the tray bar was chosen.
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