Add section names to settings

[MustafaJafar]

Changelog Description

This PR provides extra clarity about different sections in the addon settings by add section names for settings.

Additional info

Motivation: the wip application addon documentation is mentioning two main categories/layers for application settings.
So, I thought about reflecting that in the settings.

Testing notes:

Everything should work as usual

[BigRoy]

For context. Here's a before screenshot.

I'm not completely convinced it's needed but it does look clearer at first sight so fine by me.

Maybe @Innders or @mkolar has better ideas?

[Innders]

I can understand the motivation behind it but I also agree with @BigRoy. I had to inspect the code to actually spot the difference.

[BigRoy]

I can understand the motivation behind it but I also agree with @BigRoy. I had to inspect the code to actually spot the difference.

@Innders Does that mean you approve or disapprove? Or have other comments?

[MustafaJafar]

I'm not completely convinced it's needed but it does look clearer at first sight so fine by me.

It's not needed. but it looks nicer in the docs.

[BigRoy]

I'd say - merge this. It's cosmetics, and doesn't affect settings much if we redesign later?