Move profile groups page to dashboard

For #2069

See merge request !1654

Change button styles

Styles for buttons are changed to match user expectations.

Fixes #2004

See merge request !1580

Because changing username largely affects the application, it should
not be green, but be more of a warning change, which is why it's now
orange.

Styles for buttons are changed to match user expectations.

This commit adds consistency to small things like periods, commas,
etc. Also gives additional information to buttons and headers.
Fixes #2002, #2005, #2003