Now that the tray is shown temporarily when a tray icon appears,
we can decrease its visible width when concealed to interfere less
with window content without hurting discoverability.
https://bugzilla.gnome.org/show_bug.cgi?id=746787
There is a balance to hit between discoverability and getting out
of the way, and the legacy tray currently fails in both regards.
To address the first issue, temporarily reveal the tray when a
new icon is added.
https://bugzilla.gnome.org/show_bug.cgi?id=746025
There is currently no way to trigger an icon's right-click menu by
keyboard. While there's a good chance that the icon will ignore
<shift>F10 and similar shortcuts, passing on key events will at
least make it work for some icons ...
https://bugzilla.gnome.org/show_bug.cgi?id=746487
While legacy status icons lack a proper accessible name of their own,
we can try to find the corresponding application or the icon's window
title - hopefully most status icons provide at least one, so they
don't show up completely "blank" in screen readers.
https://bugzilla.gnome.org/show_bug.cgi?id=746487
While legacy status icons are notoriously bad with regard to
accessibility (well, among many other things), we should still
make them available via ctrl-alt-tab ...
https://bugzilla.gnome.org/show_bug.cgi?id=746022
Commit 5a8923ef95 removed support for legacy status icons from
the notification system, as we no longer want them to appear as
notifications. As we are unfortunately not quite at a point where
we can remove all support for them for good, so we now need an
alternative place to put them. Add a small dedicated tray at the
bottom which appears when any legacy status icons are active. By
default it is almost completely hidden to not interfere with the
user's windows, but can be expanded on demand to interact with
the icons.
https://bugzilla.gnome.org/show_bug.cgi?id=745162
