copy inline result from its menu

For large inline results, I sometimes want to view/search all of it which copying enables. I've done this enough [that I have a keystroke](https://github.com/cldwalker/ltfiles/blob/6ca79bb00f152f911f6abdff3b97bee42a9c5158/src/lt/plugins/ltfiles/inline-result.cljs#L30-L32) that works seamlessly 90% of the time. I figure having this in the menu would be useful to others and to me in cases where my keystroke doesn't work (i.e. non-paredit scenarios).