fix for glushchenko#395 Title doesn't change while in preview mode (g…

…lushchenko#396)

glushchenko#384 - auto detect files encoding

- Fixes text bundle duplicate

- Fixes text bundle drag and drop
- Fixes double cursors

glushchenko#370

glushchenko#355

- Fixes autocompletion

- Fixes glushchenko#365

- Adds dark mode

glushchenko#360

Implements glushchenko#273 glushchenko#346 glushchenko#347

glushchenko#337