Triggers the Share Not Allowed warning dialog when attempting to add a student to a widget without guest access, even if that student has the support role. When attempting to add multiple users as collaborators, it will add all but students and return an error saying students cannot be added as collaborators.
Triggers the Share Not Allowed warning dialog when attempting to add a student to a widget without guest access, even if that student has the support role. When attempting to add multiple users as collaborators, it will add all but students and return an error saying students cannot be added as collaborators.
Fix for #1502