Use move resize geometry in AbstractClient::applyWindowRules()

Abstract clients tolerate passing the shaded window geometry to
moveResize().

But the main issue with applyWindowRules() is that it uses the current
frame geometry even though it calls moveResize(). It's not a big deal
but it's error prone.

This change ports applyWindowRules() to the move resize geometry, which
makes code more straightforward and ensures that kwin uses right
geometry type with moveResize().