[FEATURE]: Modified Files list clickable

[michaljach]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Make the Modified Files list in the right sidebar clickable so I can easily click and see file diff in the main window.

[JFEspanolito]

Extra Feature: Let users move the file list to the left. Forcing the user to have the list on the right is inconvenient.