Open configured PLUG_EDITOR doesn't "reset" properly #174
Description
The ability to hold down "c" or "d" and click somewhere on your website to open up the source file in your editor is really cool. However I had to make one change compared to the docs to get it working properly.
Using LibreWolf 143.0.3-1 (Firefox based) and PLUG_EDITOR="cursor://file/__FILE__:__LINE__" I got the behavior where the Javascript missed registering the keyup event after the editor was opened (and got the focus). This caused it to re-open the same file over and over again as soon as a clicked the page (no longer holding down "c"). I sprinkled some console.log statements, and saw that the "keyup" wasn't always triggered. I'm guessing this could depend on your browser, editor etc, but nonetheless it seems like a bit of a race condition in it's current state.
My very simple fix/workaround was to just add a blur event handler, like this: window.addEventListener("blur", e => keyDown = null). Maybe there's some more elegant solution, but this seems to work fine for me.