I often find myself switching over to my second screen while playing games like WoW for example. Inspired by the fact that for a couple months now WoW always keeps my mouse cursor confined to the monitor with the game on, no matter what I do I was thinking:
Man how awesome would it be, if there was something like the host key in virtualbox - hit the key and the mouse is confined to the current monitor/virtual desktop, hit it again to release.
I may play around with README - xpointerbarrier - [DesktopEnv] Create X11 pointer barriers around your working area if I find a way to tell WoW not to grab my cursor exclusively.
But this is probably not the right place to brainstorm about that, so back to topic:
I would love a feature similar to the host key in virtualbox but for (wine) games in lutris.
Stay healthy and take care