Files navigation using keyboard (+shortcuts)

[pilsnerbeer]

Is your feature request related to a problem? Please describe.
This small enhancement request derives from desire to be able to control and navigate through files using keyboard. There are two parts of this request:

1. Navigation

• Being able to navigate through files using arrows: UP and DOWN moves the selection. While this does work, it also scrolls the window up and down, so sometimes you cant see which file you've selected. The solution is to disable window scrolling using arrows.

• Being able to go back and forward in directories using Alt+left/right Arrow. This is currently not implemented I believe, so it moves back/forward on a browser level, instead of the directory level.

2. Shortcuts

• Ability to use some of the most widely used keyboard shortcuts: Shift+arrow for selection of multiple files/folders, Delete for removal, "V" for triggering grid/list view and menu using the menu key on keyboard.

Good reference for all of this would be Google Drive

[Spartachetto]

Duplicate of #1444