Make "Remove unused" able to just apply on individual bins or multiple selection of clips.

as I mostly have lots of footages on my project and after assembly and a rough cut, most of them are unused , so I  use "Remove Unused" comand  to make my projcter lighter. so for me it's a very useful tool. I wish it developed and give us options to select kind of files, etc. 
there are sometime that I need to apply "Remove Unused" but not in the whole project, just on a bin or on a group selected clips. It would be useful to have a "Remove Unused" while you do a right-click on bin or selected clips. 

thank you.