Ability to open sub-directory and make it root

[nezartarbin]

Hi! First of all, thank you so much for this app. I looked so hard for something like this and I finally found yours. Great work! I do have a few recommendations and/or issues I found, but this is still a great app that I plan to use a lot! :)

Currently, I am able to make a parent directory root by pressing p. I would appreciate a similar functionality, but instead it opens a highlighted sub-directory and makes it the new root, if it is within scope of this app. Thanks!