[Feature request] Keep theme options palette open after toggle

[LemuelCushing]

Hi,
I have no idea if the API allows this (searched a bit, but it's a little above my head I guess), but it'd be super handy to be able to quickly toggle theme options from the command palette without having to open the palette and re-navigate each time an option is toggled. That is, having a persistent command palette in the theme options menu.

Thanks to helpful advice on the Discord chat, I've been able to locate a similar functionality in the PackageResourceViewer package. I'm adding it here because I have to get back to my day job, and making sense of this code is still a bit above my head, but I hope to come back to it and give it a shot when time permits. That is, unless it is kindly implemented by a passing developer who finds this a useful addition, in which case I hope the prv reference helps.

[benweier]

A great idea! I'm open to contributions as well if I don't get around to it in the future