[Suggestion] Make buttons movable - "Last Tabs" / "Downloads" / "Sound OFF/ON"

[mabay]

Suggestion. Make buttons movable - "Last Tabs" / "Downloads" / "Sound OFF/ON".
Add support to change possitions of this buttons in toolbar. 
At first, possible to change "Last Tabs" to toolbars at right! Also to change position with extensions for individual usability.

Also behavior about "Last Tabs" and it right and left clik option