Fix #1319

Make game document window non-modal
Implement #654

Adds ability to sort deck in deck editor via drag and drop. Alphabetical
sort still not implemented because I can't come up with a good way to do
it.
fix #1309

add option to cancel additional instances
hopefully improved feedback for drag sorting deck
Merge pull request #1325 from Soul1355/master

Couple little things to get back into it.