Make remote debug elements ignore the canvas scaling

[YeldhamDev]

Supersedes #98984.

[KoBeWi]

Not sure what issue does this try to fix. I'm seeing the same results with and without this change.

[YeldhamDev]

Increase the value of display/window/stretch/scale in the Project Settings to 2. Without this, both the selection square and popup will be bigger as well.

However, something broke after this PR was created, and it doesn't shrink the popup's size anymore. Will investigate why.

[YeldhamDev]

Correction, it seems to not be shrinking only on Wayland, but it does on X11, odd...
CC @deralmas could you help shed a light on this?

[deralmas]

Hi, I think that this might be related to the embedder, as the behavior looks good on a "bare" window (completely unembedded, not even floating workspace). It indeed looks kinda broken when the game is embedded.

That's kinda weird though, as the only thing we adjust in popup messages is the position, not the size. I'll take a closer look as soon as I can.

That said, this issue seems unrelated to this PR itself and thus I don't think that it's blocking.

[Repiteo]

Thanks!