multiple repaints only flushImage only once

[Niko Sams]

Hi,

I think I found the main problem with marbles painting performance. When panning
marble draws an animation with >3 frames. But on android only the
latest frame is displayed.
And that of course seems very slow.
The problem is that the redrawTimer (in QFbScreen) doesn't timeout
during multiple repaint calls,
I guess the event loop is never entered during the animation.

How can I fix that?

Niko