Gotta merge fast

Fixes lots of things having to do with super long comments. Importantly: they break instead of going over the whole page if there is a super long word. Also, there is proper spacing within the comment display box after a comment is posted.

Integrating one of cg2v's improvements:

After set_course renders the 404 page inline, it needs to immediately return
since any future exception will try to redirect or render triggering a double
render error

Integrating a few of cg2v's improvements:

When exceptions occur processing handins or autograde output, send the
exception to ExceptionNotifier and the course log. Otherwise, the only
notification in some cases goes to the student, who gets a bland
"submission failed" flash that they probably ignore.

* bolded notice that annotations and gradebook are decoupled

* added annotation collapse and expand buttons

* decoupled annotations and gradebook again

* brought back head :no_content

* Remove disabled fields in create course user datum (#877)

* removes a check that stops annotations with the same submission and problem number from being added

* removed annotation updates that expect there to be a single annotation for each submission and problem

* Untangled gradebook and annotations, so gradebook isn't affected by annotation scores and scores can take any value.

* Begun rollout of our Slack and updated logo

* Updated main url

* Fixed Add-To-Slack btn

* fixed annotation deletion also deleting score bug and added a note for instructors

* reverted db migration changes

* Added point deductions on annotations

* Problem and Score box now shows after update annotation

* Problem field shows in editAnnotation

* Worked on properly updating scores

* removes a check that stops annotations with the same submission and problem number from being added

* removed annotation updates that expect there to be a single annotation for each submission and problem

* Untangled gradebook and annotations, so gradebook isn't affected by annotation scores and scores can take any value.

* Begun rollout of our Slack and updated logo

* Updated main url

* Fixed Add-To-Slack btn

* fixed annotation deletion also deleting score bug and added a note for instructors

* Added point deductions on annotations

* reverted db migration changes

* Problem and Score box now shows after update annotation

* Problem field shows in editAnnotation

* Worked on properly updating scores

* Changed highlight color for lines > 80ch

* Code highlights now include all characters

* Added feature to minimize code annotations

* Changed minimize button to material-icon 'remove' in code anns.

* Annotations are now minimized by default

* Removed debugging print statements

* Removed more print statements

* Fixed no-click error, added checks for scores/gen probs

* removes a check that stops annotations with the same submission and problem number from being added

* removed annotation updates that expect there to be a single annotation for each submission and problem

* Untangled gradebook and annotations, so gradebook isn't affected by annotation scores and scores can take any value.

* Begun rollout of our Slack and updated logo

* Updated main url

* Fixed Add-To-Slack btn

* fixed annotation deletion also deleting score bug and added a note for instructors

* Added point deductions on annotations

* reverted db migration changes

* Problem and Score box now shows after update annotation

* Problem field shows in editAnnotation

* Worked on properly updating scores

* Untangled gradebook and annotations, so gradebook isn't affected by annotation scores and scores can take any value.

* Begun rollout of our Slack and updated logo

* Updated main url

* Fixed Add-To-Slack btn

* fixed annotation deletion also deleting score bug and added a note for instructors

* reverted db migration changes

* Added point deductions on annotations

* Worked on properly updating scores

* Changed highlight color for lines > 80ch

* Code highlights now include all characters

* Added feature to minimize code annotations

* Changed minimize button to material-icon 'remove' in code anns.

* Annotations are now minimized by default

* Removed debugging print statements

* Removed more print statements

* Fixed no-click error, added checks for scores/gen probs

* Removed minimize button in PDF anns

* Replaced submit button that was deleted during rebase

* revert to mysql, and properly comment unused section

* correct order of config initilization

Form fixes jacob

Fix issue 667