[INBV][BOOTVID] Rotation bar is too slow and sometimes paused

You know the second ReactOS startup shows the rotation bar at bottom of the screen. The problem is that, it is sometimes paused and too slow.

I don't know why the drawing is paused but maybe the painting status or thread management is incorrect. We are using the RLE (Run-Length Encoding) bitmaps as images to show image in startup screen. They are wrongly decoding at every rendering time.

The target sources are: ntoskrnl/inbv and drivers/base/bootvid.