Feature request: Better support for workflow based on _Selected directory

In FRW I can either select the photos I want to keep (i.e., move them into "_Selected" directory) or I select the photos to remove (move them into "_Rejected" directory).
FRW supports the second workflow with two helpful features:

• I can undo the deletion of a photo by executing "Undelete: move one level up"
• I can permanently delete rejected files using the command "Clear _Rejected subfolder"

Unforunately it seems that there are no equivalent commands for the _Selected directory. I would find these two features very helpful:

• Undo the selection of a photo by moving it one level up.
• Delete all files in the parent directory and afterwards move all files from _Selected to the parent directory (basically delete everything that was not selected).

Is this possible?