Fix bug when removing user labels on logout

First identify the user labels, then remove them. This bug manifested
in dev mode, but not in production mode.
Merge pull request #74 from mdpiper/master

Fix bug when removing user labels on logout
Update text on sign-in screen

Added WMT title and version.
Merge pull request #75 from mdpiper/styling-and-appearance

Update text on sign-in screen