Patch for previous fix

Previous update had bugs which are hopefully fixed here.

Fixes the persistent issue. Now you wouldn't need to recreate your beautiful block lists after every restart!

No annoying borders are added to the search result anymore.

This new release brings new improvements:
1. Popup option instead of the sidebar. This allows for much shorter time in adding newer keywords and websites.
2. Quick toggle enable/disable option. This was not possible before.
3. New UI design as per https://design.firefox.com/photon/index.html so thinks look sleek and are as usable as possible!