[BUG]: Changing UI theme resets game thumbnail size in the library

[13xforever]

Describe the Bug

Here's before and after you change the theme pref:

Notice the scale slider retaining the position, however if you click on either List view or Grid view again, the slider position is updated to reset 50% position.

Reproduction Steps

1. Have non-default thumbnail scaling
2. Open global settings and change theme to anything else

Expected Behavior

Changing theme preserves current scaling preference

PCSX2 Revision

1.7.4005

Operating System

Windows 11

If Linux - Specify Distro

No response

[RedDevilus]

Yeah, there are other issues like it remembers old colors (partially) for themes when you change on the fly and seems to break some other stuff. The behaviour kinda changed when Qt 6.4 was used, but not sure if that was main reason or side-effect.

But seem fine after fully restarting PCSX2 except the Game Grid size can break seemingly random still.

[MrCK1]

Still looks to be an issue as of 1.7.4589

[Mrlinkwii]

Still looks to be an issue as of v1.7.4904

[kamfretoz]

Still looks to be an issue as of v1.7.4970