prevent specific key combinations from pass-through

I'm using a tiling window manager without window decorations, and when I open a winapps app that has no close button (such as the full Windows RDP session), quitting out without resorting to `xkill` is a bit cumbersome:

- switch to windowed mode (I'm using i3, which has window decorations in that mode)
- hover over the thin tab above the window
- press super+shift+q
- switch back to tiling mode

I searched for this issue and stumbled upon [someone on some forum that had the exact same issue](https://www.mangolassi.it/topic/13859/prevent-specific-key-combo-pass-through-in-qemu-kvm-virt-manager), but the difference is they weren't running winapps, so it wasn't as seamless (I believe that they were using virt-manager, that has a little popover when edging on a corner in fullscreen mode)

Even worse, if I ever go into fullscreen mode, the only option left is a forced reboot through the physical power button (or maybe shutting down the VM while inside could work?)

I was wondering if there was a way around this.

Ideally, I would want to bypass all key combinations starting with a super key