This is a pretty good implementation at this point.
* clicking extension will pull up social share and populate based on URL of previous page
* hitting send on social share will send an event to firebase
* listener will populate a notification on a new firebase event which redirects to social share
* if you are sending from social share and you previously came from a notification, it won't BSU
* added new icons
* makes sure that notifications only displayed for new messages
* check to only bsu posts that other people created