_targets #38573_
At first I just wanted to add support for nested context menus.
But then I also had to add a search box, so the focus wouldn't get weird.
End result:

This gets rid of the need to have the search box and the command bar both track item keybindings - now it's just in the command bar.
Closes#38299Closes#38442
**WARNING:** This PR will probably blow up all in-flight PRs
at some point in the early days of CmdPal, two of us created seperate
`Exts` and `exts` dirs. Depending on what the casing was on the branch
that you checked one of those out from, it'd get stuck like that on your
PC forever.
Windows didn't care, so we never noticed.
But GitHub does care, and now browsing the source on GitHub is basically
impossible.
Closes#38081