Remove custom stylesheet + add selectable stylesheet directory

[jonaseberle]

By default my desktop environment's dark mode leads to unusable menus with the SwiftGUI standard stylesheet:

I also found the GUI really not very appealing as it was. I think even just having the custom background images and colors is a usability problem.

One could try to improve the stylesheet, maybe it is possible to make it dark mode aware etc.etc. - or get to the root of the problem: the custom stylesheet.

I have made a test and just removed anything from the .qss stylesheet files - and this is a revelation. Suddenly the GUI looks more professional and is easier to use. I get my nice desktop environment accent color and widget style and all the work those designers and developers put into better usability of these Qt widgets for free:

So I propose to make this the default: Only provide styles where really needed.

Selecting a custom stylesheet could then go into the settings. IMHO it should be done by selecting a custom directory holding your overwriting .qss files so Swift updates do not overwrite your custom styles (docs and docs). Here on the very top would be a good place for that directory selector IMHO.

• [ ] thin out any unnecessary, especially colors/backgrounds/text size/paddings .qss rules
• [ ] UI/settings: add possiblitiy to select a stylesheet directory
• [ ] update docs
• [ ] release notes could mention how to re-enable the former stylesheets

If that sounds good (or bad) to you, please leave a comment. I could work on it.

[oktal3700]

Please open a separate issue for the dark mode bug. That will need to be fixed in any case.

I like your proposal, but we will have to take care that it doesn't cause any unintended breakages if there is any code that depends on specific attributes of the stylesheet.

[jonaseberle]

tbh I would not advise to work on trying to fix the current stylesheet. If it becomes optional it will be just one among others and does not have to be maintained any more.