Destroy request is not specified for foreign toplevel manager and it
does not prevent the compositor from sending more events.
Libwayland would ignore events to a destroyed objects, but that could
indirectly cause a gap in the sequence of new object ids and trigger
error condition in the library.
With this commit waybar sends a `stop` request to notify the compositor
about the destruction of a toplevel manager. That fixes abnormal
termination of the bar with following errors:
```
(waybar:11791): Gdk-DEBUG: 20:04:19.778: not a valid new object id (4278190088), message toplevel(n)
Gdk-Message: 20:04:19.778: Error reading events from display: Invalid argument
```
Previously we only checked when connecting to the server whether it had
the minimum required version but didn't act accordingly in the various
functions that use the functionality of later versions. If there were a
server in the wild, that actually would not have this functionality,
there would have been a crash. Fix this by checking the version before
using the functionality and gracefully abort it.
There was an update the of the toplevel manager protocol. Unfortunately,
there are no new interesting updates with regard to the taskbar
implementation. Nonetheless, update the protocol xml files to the latest
version so that the implementation is up-to-date.
While being there, also change the debug warning that is shown when
there is a version mismatch between the server and client version of the
protocol.
It's not allowed to bind to a higher version of a wayland protocol than
supported by the client. Binding wlr-foreign-toplevel-manager-v1 v3 to
a generated code for v2 causes errors in libwayland due to a missing
handler for `zwlr_foreign_toplevel_handle_v1.parent` event.
The fix for taskbar tooltips in 6a2d214b55 was incomplete: it causes the label
to contain escaped titles. Use set_markup so that GTK decodes markup again,
but only if requested by the user (disabling markup is needed if using format
strings like "{title:.15}" to avoid terminating the string in the middle of an
XML entity).
Move the lower_app_id lookup logic completely in the image_load_icon
method and use it also when looking up the icon from the desktop files
as well as icon themes.
