Avatars are now Surfaces, Gtk.Window has no method yet to add Surfaces
as icons.
Transforming them back to pixbufs is not viable because pixbufs cant hold
the scale information, and we have no way to set it.
This was only used with single chat windows, which is a mode that came
out of style and is probably not used often anymore.
Fixes#8895
On destroy() the window that was last focused gets the focus
again. if destroy() is called from the StartChat Dialog, the new
ChatControl is not yet focused, because present() seems to be asynchron,
at least on KDE, and takes time.
- Move ActionBar into HeaderMenu
- Make Design of ChatControl look cleaner
- Hide the Roster in Groupchats per default
- Add Button to hide/show Roster in Groupchats
- Move Groupchat topic into popover
- Display Avatars on the right side of the ChatControl and status on the
left
- Add a default Avatar for contacts that have none