Revert "gdk_x11_window_lookup_for_display was added in Gtk+2.24"

This reverts commit 9a8965fa0c783bc8221a1ccd55247e5e6a4ee88a.

It caused the run dialog to fail.
Bump version to 1.9.4
removed obsolete configure option
Update news
clock: use GNetworkMonitor

Taken from gnome-panel commit: 04e6ef4dbc6a1fdc720b750fdf87a7f43a8a2df6
From: Alberts Muktupāvels <alberts.muktupavels@gmail.com>
Add back Glib 2.32 support
Revert "Add back Glib 2.32 support"

This reverts commit 7389d3e9dd5390b3d4e1dabbe6dd763a8dc1a0d7.
Merge remote-tracking branch 'upstream/master'