STATIC_URL has not been advocated by Django for many years now. The
static template tag deals properly with multiple static providers and
those which are not just local files.

Moved Impersonate view to its own app, activate by POST instead of GET, made view work with any user model. refs: #12

See https://webdesign.tutsplus.com/tutorials/how-to-make-the-bootstrap-navbar-dropdown-work-on-hover--cms-33840