wavepack3t

Results 2 issues of wavepack3t

In Firefox 65.0.2, the options in the project navigator appear behind the navigator modal itself. ![image](https://user-images.githubusercontent.com/38678140/54074511-1b5f4480-4261-11e9-9efd-a95eec591732.png) This PR fixes this and also makes it so the navigator modal stops overflowing...

This is a wonderful plugin which I use daily. My request is for a keyboard shortcut to activate a search modal. JIRA uses `/` for this, and DuckDuckGo uses `h`....