Added Request Feedback button to the share plan page ...

modifications to tooltips and email defaults

moved email constants to usermailer

aded missing colon

started adding in the button to request feedback

modifications to tooltips and email defaults

started adding in the button to request feedback

finsihed adding request feedback button

Removed old comment

switched to roles

updated to role based reviewer

updated user_mailer

moved feedback confirmation defaults to methods on UserMailer

added default visibility back to schema.rb

made adjustments based on PR feedback

refactored to use flagshihtzu function that returns values for flags

Merge pull request #807 from DigitalCurationCentre/issue638 ...

Issue 638