Make 'make check' work (the docs/Makefile.am contains incorrect statement).
Call GtkWidget's handler button_release_event() before we unmount.

If we unmount first then call handler it will be done over already
removed row (due to unmount callbacks) ant that may confuse GTK.
Therefore let GTK do its work first and do ours after that.
[#3614500]Add weak notify on Places view to detach it from context menu.

The most probably FmPlacesView is destroyed after we click Unmount yet
before menu is destroyed, therefore "attach_widget" property becomes
invalid and access to it should be denied when FmPlacesView is gone.
Increase ABI revision to 5 before release (now ABI code is 4:5:1)
Release v1.1.2.2.