I have: - Rebased against master - Removed default shortcut for switch focus feature - switch focus between main and splitted window

Please, review the code, let me know any issues you encounter or merge it if you find it OK.

I have also noticed an issue regarding split window plugin. When editing in the splitted window editor, opening and closing braces, parentheses, brackets,... pairs are not being highlighted as they are in the main editor. I guess this deserves a separate issue and PR.