Don't forget the GUI when you make even trivial API changes

[Gary Poster]

Hey everyone.

We have not had bandwidth to switch the GUI's CI from PyJuju to Juju
Core yet.  I'll see if we can carve that out in September.  Meanwhile,
we are in particular risk from API changes in core.

Even trivial things, like changing the order of results in the
allwatcher, which happened recently, can expose new bugs in the GUI.
Tread carefully, please. :-)

Thanks,

Gary