Revert "Remove bounds from DrawTextureReflection because it was never used"

This reverts commit f5f1a9148149e17a9856e0b4c35e439802c26f39.

Conflicts:
	Vocaluxe/Base/CMain.cs
	Vocaluxe/Screens/CScreenSing.cs
	VocaluxeLib/IBasic.cs
	VocaluxeLib/Menu/CStatic.cs
	VocaluxeLib/Menu/SongMenu/CSongMenuTileBoard.cs
Introduce RenderRect for easy access to the full screen rect
Handle drawing with bounds in one place
Also reduces drawing code a lot...