Fix size in TimerElapsed() instead of PaintForm()
Fix size in TimerElapsed() instead of PaintForm()

For some reason, this fixes the issue (unless I just can't reproduce it
anymore since it's a race condition). It also seems slightly cleaner.

Resolves #435

ROMaster2/LiveSplit,Fluzzarn/LiveSplit,Glurmo/LiveSplit,LiveSplit/LiveSplit,kugelrund/LiveSplit,ROMaster2/LiveSplit,Dalet/LiveSplit,Dalet/LiveSplit,Fluzzarn/LiveSplit,kugelrund/LiveSplit,Fluzzarn/LiveSplit,Glurmo/LiveSplit,Glurmo/LiveSplit,Dalet/LiveSplit,kugelrund/LiveSplit,ROMaster2/LiveSplit