* allow testids in settings sections
* use semantic headings in LabsUserSettingsTab
* put back margin var
* use SettingsTab wrapper
* use semantic headings for deactivate acc section
* use semantic heading in manage integratios
* i18n
* use currentColor in warning-triangle svg, update use in RoomStatusBar
* use semantic headings for discovery section
* test manage integration settings
* test deactivate account section display
* remove SettingsFieldset margins
* threepids styles
* remove debug
* test discovery email and phone
These icons are based on Feather as the original source, but they have various
tweaks applied, such as stroke width, color, etc. Hopefully the tweaked name
makes this more obvious in the future.
