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

Major improvements to forms. This should make forms look more uniform and have expected behaviors across all forms.

Add error flash if the user has javascript disabled warning them that some features may not be available.