Currently when using auto-grouping, the list is ungrouped each
time a window is closed, and then possibly re-grouped on the next
allocation - as a result, there is a brief "ungroup flash" if the
list is supposed to remain grouped.
Avoid this by computing the width the ungrouped list would have
rather than by actually ungrouping it.
https://bugzilla.gnome.org/show_bug.cgi?id=738286
Since commit 191c7ccc24, we check whether we already have a window
in the list before re-adding it on MetaWorkspace::window-added.
We can do something similar on MetaWorkspace::window-removed to
avoid some extra work when a window is moved between workspaces
rather than destroyed.
The list returned may contain windows that are being destroyed.
The ShellGlobal method filters those out, so use that instead; we
should eventually stop looking at window actors when we want windows,
but for now this is the easy and safe thing to do.
Rather than re-implementing the function (and risk missing improvements
like the launch animation), call the original one as if the user had
middle-clicked the launcher.
We do need to inject our own handler to treat application-switch
actions the same way as the corresponding window-switch ones;
we can actually express exactly this without re-implementing the
entire function, by calling the original handler with a tweaked
action parameter - the resulting code is not only more concise,
but should also be a bit more robust against changes in core.
https://bugzilla.gnome.org/show_bug.cgi?id=737457
Since shell commit dd85670f8b25, the handler got a return value to
determine whether Escape should be handled automatically; we do
want this for the window switcher, so add an appropriate return
value to restore the expected behavior.
https://bugzilla.gnome.org/show_bug.cgi?id=737457
When a window's on-all-workspaces property changes to true, the
workspaces the window was not located on will emit the ::window-added
signal for the window; however we don't want multiple buttons for
the same window, so filter out the extra calls.
https://bugzilla.gnome.org/show_bug.cgi?id=736398
