We now show a list of users and allow you to deactivate a user using the
same process as `python manage.py deactivate_user`.
We add a new menu item accessible from the gear icon which will eventually
have much more than just this, but we have a good start here.
Here we also add a property to UserProfile which determines whether you're
eligible to access the administration panel, and then have code which shows
the menu option if so.
This introduces a new JS file, admin.js.
(imported from commit 52296fdedb46b4f32d541df43022ffccfb277297)
In a few cases the $.each was doing something imperatively that was
terser and easier to understand by using a different Underscore method,
so a few of these I rewrote.
Some code was using the fact that jQuery sets `this` in the callback to
be the item; I rewrote those to use an explicit parameter.
Some code was using $(some selector).each(callback). I converted these
to _.each($(some selector), callback).
One function, ui.process_condensing, was written to be a jQuery $.each
callback despite being in a totally different module from code using it.
I noticed this and updated the function's args.
(imported from commit bf5922a35f257c168cc09ec1d077415d6ef19a03)