Problem with the ScratchPad

[Silvio Heinrich]

I think there is some problem with the scratchpad.
When I open the paintop editor and load a preset, the preset icon isn't 
loaded into the scratchpad anymore.
I had a couple of crashes too. Everytime I opened the paintop editor 
krita crashed with a backtrace pointing somewhere to:
KisScratchPad::paintEvent(...) -> convertToQImage(...)

I cannot give a backtrace because it doesn't crash anymore.
I didn't chance anything. It suddenly stopped crashing, so it seems to 
be random.
But even if it isn't crashing anymore, the icon still won't show up in 
the scratchpad, so it might be connected.