[BUG]: Upscaling makes Window Size scaling smaller on Software renderer

[Berylskid]

Describe the Bug

"View > Window Size > x Scale" fits window to smaller size on SW renderer if HW's Internal Resolution is set to higher than Native.

• It doesn't occur on any HW renderers.

Reproduction Steps

1. Boot a game
2. Open Game Properties
3. Select 2x Native for Internal Resolution
4. View > Window Size > 2x Scale, then Window Size fits 2x Scale
5. Toggle renderer
6. View > Window Size > 2x Scale again, but then Window Size fits 1x Scale instead

Expected Behavior

"View > Window Size > x Scale" should not be affected by upscaling.

PCSX2 Revision

v1.7.5557 and fc2767f

Operating System

Windows 11

If Linux - Specify Distro

No response

Logs & Dumps

No response