Overlay position is wrong if setting a game resolution different from native

[carlocastoldi]

Description

If the resolution is smaller than the native OS resolution (but full screen), the overlay is positioned more in the centre. I suspect it uses the boundaries as if the game was windowed

Steps to reproduce

1. set the overlay to touch the boundaries of the game
2. run the game full screen at a lower resolution
3. see that that the overlay is not near the border of the display

Mumble version

1.4.0 + #5949

Mumble component

Client

OS

Linux

Reproducible?

Yes

Additional information

No response

Relevant log output

No response

Screenshots

Overlay settings:

Full screen, native resolution (works as intended):

Full screen, lower resolution:

Windowed, lower resolution (works as intended):

[carlocastoldi]

this bug is not present on /src/tests/OverlayTest.cpp. I guess it's game specific, then?