Dot 5

I fixed a rather significant bug that prevented plugins from installing
property. I didn't even realize it had existed.

I close #25 and close #41. I'm not entirely happy with #41 and how the
UI turned out. I'll probably make a new issue and revise it later if I
really find it ugly enough to change.

Tomorrow I'll either work on syncing settings or Spotify. Probably the
former as it's much more important.