[Bug]: Various shades of grey in darkmode

[AndyScherzinger]

Might be on purpose, hence close if n/a

Sync tab	Connection settings tab	Settings	win11 settings example

• various grey tones for the main content area
• slightly different size/color on checkboyes and radio buttons

[mgallien]

main dialog screenshot using more native styling with dark mode (Fusion qml style)

set status

this was done by using #6980
there is an issue with the Windows native QML style
this style should look more native but is not working with dark mode
I tried to fix this but that may be a lot of work

[mgallien]

I realized that current builds on Windows use "fusion" widget style for QWidget based dialogs
with native style, I think we are already better

please note that there is a double frame around the folder configuration area

[mgallien]

with better native style on Windows and a couple more small improvements

[AndyScherzinger]

Nice improvements @mgallien 🤩

[mgallien]

I am unsure what to do with the QML user interfaces
should we stay with Fusion non native but looking good in bright and dark mode ?
should we go with native Windows style and spend a big effort trying to make it work in dark mode ?

I can provide bright mode screenshots to help

@AndyScherzinger @jancborchardt

[mgallien]

Fusion bright mode

Windows bright mode

[jancborchardt]

@mgallien we should always prefer to have it as native as possible on all platforms. In the 2 screenshots, besides some bugs in the Windows version that have to be fixed, there is almost no discernible difference, and both can look more native.

Another example in settings, the tabs don’t look like standard (more like 2 buttons?) and the line containers for settings groups look quite dated: