feels more responsive if immediate, also make fixed size.
unused import.
urlparse has moved into urllib in Python 3, so try Django's six module for it.
force_unicode is gone these days, replaced with force_text
Python 3 drops `func_closure`, only using `__closure__`
but the ordering of cells in the `__closure__` is different
between Python 2 & 3.
fix IndentError under older versions.
Merge branch 'bugfix/django16'
It was pointed out to me on IRC (by kyrix I think) that mostly, contrib.admin.site is correct, because it's the default or has been monkey patched.
So now we check for that first by comparing it's app_name to the given one.
Improve edit field to take account of other important fields (Those with leading underscores, and those that form part of a unique_together constraint that includes our field)
allow controlling when rendering the admin index button.
{% render_admin_button … … for anyone %}
{% render_admin_button … … for staff %}
etc, where the option is one of no-one, anyone, staff, superusers.