Autofill shortcut
Fixes #91 (closed)
Adds autofill to the popup based on a user having a secret with a matching domain for the current tab. Requires two motions - activate popup and do autofill.
- Removes ext permission to run script on all tabs and replaces this with just active tab.
- Adds url sanitation
- Removes background page for now. We don't need it. May want to reintroduce it later
Edited by David Burke