Fix a translucency repaint glitch in Wayland

When the konsole profile is set to use translucency and the konole part is used in an app that doesn't support it, like konsole or dolphin, on X11 the translucency has no effect and the konsole part is opaque. On wayland this doesn't happen and it tries to make that area of the app translucent, but then the damage information is not correctly set and there are drawing glitches in the transparent area.

This just disables transparency when the toplevel window doesn't have the WA_TranslucentBackground attribute set.