Make sure gear fuel and alt weapon overlays are always drawn on top

Fix foreground flakes (layer 2+6) disappearing when moving camera in world wrap world

Fix hard-to-read text on campaign and training page in frontend at October 31 The text was yellow against a white background (the moon in the Halloween background). This is fixed by darkening the critical area.

Update outdated and broken holiday stylesheets Each style was updated by copying qt.css and then adjusting the required definitions such as background image and color.