quicksettings: Update to appearance to current designs
We should update the quick settings to current design Teams/Design/os-mockups@28089330 as it eases the implementation and current ones would look odd on transparent / blured background. It will then also be easier to e.g. add menus for wifi selection etc.
@snwh is that something you could look at. Should be all CSS and tweaking src/ui/quick-setting.ui
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