at the point where the application is about to exit it is not safe to even
access the global static (by calling Plasma::Theme::defaultTheme()) since
it will be deleted
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
this will (most importantly) break some applets from kde-workspace
and could use a review + some cleanups (like headers inclusions,
variables declarations, etc.) but it's pretty much complete
