Rewrite preferences as a single view

[danirabbit]

Fixes #390

Switches are used to toggle features on or off. Checkbuttons are used to include things as part of a list

[teamcons]

Width request 500 ?
I would picture something more in-line with similar apps, like terminal.
The update bar does not require this much space

have you thought about possibly wrapping the checkbox part in the same manner the notification indicator wraps notifications ? (im not sure of that widgets name) - this could reduce vertical usage, and avoid visual noise

[danirabbit]

@teamcons I just kept the existing width request.

That section is in a revealer already, so if the switch is disabled, it will hide all the extra indicator options:

[stsdc]

Would be nice to have it scrollable:

[stsdc]

I have an idea for checkboxes overhaul. Just writing to not forget:
basically mimic Wingpanel by putting black stripe with icons. Checkboxes would be placed under every icon.

Or something like this, but with checkboxes:

[danirabbit]

@stsdc I tried to add a scrolled window, but it looks like it doesn't get used when you resize the window. At least this is only an X11 bug and on Wayland it doesn't clip popovers: