Green Tab Dark Background per Cippo95

Dark background sadly doesn't give visibility to black icons: look at my grey version if you need better visibility of them.

Red search border when selected because sometimes I don't notice that it is selected, this way it is obvious.

Version 1.1:
- Green tab borders for better visibility while moving the tab (try to grab it with the mouse and move it to see the difference).
- Green border for the search pop-up because I like it more.