Merging the Development Branch from Our Fork

[edward0414]

Merging the instructor-switch feature and instructor landing page feature into a "development" branch

[nigef]

Nice, just adding here what you @edward0414 @jsyoon01 already know,

Fixes the top bullet in #143, though the modal doesn't come up and my browser window freezes when clicking the last name. I haven't been able to spot the reason in the code, yet.

Fixes the fourth bullet in #144 for the unassigned-table. Would it be possible to also fix the alignment for the assigned-table?

Fixes #145.

[nigef]

@jsyoon01, what do you think? I think this merge should be revered for two reasons:
• The modal bug causes the browser window to freeze.
• The instructor view search feature idea may have arisen due to a misunderstanding. Probably we should not have the search feature to switch utorid. Otherwise if the feature is useful, switching to another utorid should lock down to a read-only mode, or something like that, because we don't want users to morph into other users.

[edward0414]

@nigef I agree. I merged the branch at first because I thought it is just a small branch for Sungyoon and I. Now we figuring out the workflow and knowing that it's main branch for this summer group to push to, it is a good idea to not merge the PR until everything is working.