ctrl-z (undo) bug in skin editor

[vilmer]

After accidentally moving a skin component, I hit ctrl-z to undo that and next thing I know all the buttons in the simplex skin are replaced with the 'pan-up' button. Also one of my custom components is duplicated. See here for a screendump.

Grts,
Ronald

[k.ary.n]

I've been able to reproduce this and have added it to the bug tracker: Issue #122