quick settings 1: In the beginning there's the toggle
Finally, the first real quick settings branch!
This
- introduces the basic widgetry (quick settings grid, toggles)
- adds quick settings to the top bar
- ports all indicator-only items
- ports all toggle items
The code is ready for review, the CSS changes could use a closer look from Sam before this lands (probably in conjunction with quick-settings-2, as that adds a bunch more styling)
Depends on and includes !2391 (merged).