A mechanism for extensions for versioned sets

[dlglin]

Perennially we have an instructor who wants to give everyone an extension on a quiz. Changing dates and time limits for the global set has no impact on existing versions, which causes confusion.
I haven't entirely thought this through, but it should be possible to offer an interface to make a bulk modification to existing versions. I'm thinking of something on the set detail page with options like

• Extend all versions/open versions by n minutes.
• Add n attempts to all/open versions.

On the backend WW would then go through all versions of the set and add more time to the due date/reduced scoring date, or add more attempts. Instructors may want to restrict this to versions that are still open, hence the choice between all versions and open versions.

Does this sound reasonable?