Battle pictures and weather don't work when starting a battle from the Debug Menu

[fmatthew5876]

On the map, either create a picture which is visible in battle or set a weather effect. Now start a battle from debug menu.

The picture and weather will not be visible.

This happens because the Scene_Debug at the top of the stack prevents the shared scenes from being transferred.

When fixing this, we should also consider a more elegant way to handle Game_Screen::InitGraphics(). Right now it's called in both the map scene and the battle scene for battle test only. Is there a way we can more robustly initialize the shared drawables?