Style change: from white background and black text color to black background and white text color.

Functionality addition: Button to completely enable or disable the extension (flawlessly).

Also just an informational description on the possibility of changing the slider with your keyboard for precise values.

-VERSION 2-

Bugs:
- Fixed: slider value resets upon re-opening popup (not the actual volume).

New Features:
- Added mono audio toggle (on/off)