Allow assignments to be created and grades synced in same view

[gsidebo]

#172 added functionality that adds edX assignments to Canvas and then pushes student grades for those assignments. Due to a minor bug, if an assignment is created as part of this view, the grades for that assignment aren't pushed in the same view. You need to click the button a second time to sync those grades. We want the grades to be pushed whether or not the assignment is newly created in the view.

Tech note: The view includes some logic that builds a dict of assignments that exist in Canvas. That dict is used to figure out which grades should be pushed. Basically we just need to add to that dict when new assignments are created.

┆Issue is synchronized with this Trello card by Unito

[pdpinch]

@gsidebo is this still an issue?

[pdpinch]

@noisecapella is this still an issue?

[shaidar]

@gsidebo Is this still a problem or has it already been resolved?

[gsidebo]

It hasn't been resolved yet (and sorry for missing the earlier messages). I'd consider this low priority but the issue is still there

[shaidar]

@pdpinch Not sure whether Gavin or someone else addressed this already but if not, does it need to reassigned or it's not a priority?