Add Uncompact to right-click menu in Library

**Is your feature request related to a problem? Please describe.**

To uncompact a game, I have to:
1. Stop Task manager
2. right-click -> compact the game
3. uncheck compress in task manager
4. start task manager

**Describe the solution you'd like**

I would like to just:
1. right-click -> uncompact
2. (optional) start task manager

