Allow user to have no notifications
Add checking for user email and google chat account
Remake Preferences GUI to fit the rest of the module

I matched the font and added a few new descriptions to make sure the user knows what he/she needs to do
Close tab and refresh tree when update button is pushed
Merge branch 'sbl-dev' of git://github.com/struct-by-lightning/wpi-suite into update-preferences
Merge pull request #367 from sfmailand/update-preferences

Update preferences