Allow evaluation of incomplete proposals

[jayvdb]

Currently the app filters out all proposals without is_complete.

Ultimately it is the orgs choice whether to run the app before the submission deadline and/or after, and how to manage the transition if they want to try to run the app across both periods.

If the app is being run after the submission deadline, are there any proposals in the GSOC data with is_complete not true? If not, this flag doesnt seem very sensible.

Worth noting that proposals which have been finalised can not be seen by mentors before the submission deadline is passed. Any proposal which is is_complete before the deadline should not be given a final evaluation as the evaluation can only be based on the draft. Final evaluation must be made on the final proposal, so that can only be done after the deadline.

When running the app before the submission deadline, it is desirable to see the incomplete proposals, as the good ones are typically close to being finalised but there is still ongoing discussion with the mentor, and the very good students are only holding their proposal open because they are still doing research on viability of various parts of their project.

It would be nice to have a mode where all proposals (except ignored) are shown, perhaps with completed ones at the top, or two tabs for completed and incomplete.