Made it so you can copy a polygon from a polygroup and then Paste it on an imageframe and it will try to find a polygroup
with the same name and overwrite whatever is in the 0 spot. (or add itself if nothing is there)
Ctrl + Enter while on a Polygon or PolygonGroup to jump back one frame (enter jumps one forward so, opposite)
Forgot to add it so you could paste on a selected group as well.
Merge pull request #13 from TravisEvashkevich/master

Regression Fix and feature