Added support for twelve new languages: Bulgarian, Czech, Danish, Estonian, Finnish, Hungarian, Latvian, Lithuanian, Romanian, Slovak, Slovenian, Swedish

Fix non-existent hover/selection delay on first use after install

DeepL.com will appear in a tab on the current window rather than a new window when a translation is requested.

- Option to select what triggers a translation to occur over selected text (on hover, on keypress, immediately)
- Various bug fixes

- New setting to keep translations open until the selected text has been changed or removed

Fixes for FireFox:
- shrink the size of the scrollbar so that part of the translation is not cut off
- open DeepL in a new window so that its tab can be the active tab for faster translation times