Provide a shortcut key to easily apply selected color to selection in tree

[bl4ckthor]

Hello, super great tool and exactly fine for my personal use.
( Especially the fact that it also detects window names within Windows Terminal )

Request: If you have a gathered tree open with 80 nodes, it would be handy to:

• Select a color, and then apply it using a shortcut key (quick clicks + pressing shortcut)
  and/or
• Able to multi-select items in the tree and then applying the selected colour in one go (also using a shortcut key)

This would save so much time when cataloging items later on the day, or at the end of the day.
I'm not capable of doing this modification myself, but I'm pretty sure your fans will upvote this one too for a next release ;)
Much appreciated.

[aardappel]

Agree that would be nice :)

[makosear]

Just being able to multi-select items would be great.