Nested forms are not valid HTML and we were submitting the wrong
authenticity token to Rails when updating the enterprise.
I inverted the hierarchy of the form and the panels. The menu and
tab-panel structure now sits above and the enterprise edit form is
nested within.
The current structure is not ideal but it's only a transition phase. I'm
expecting the page to get re-designed at some point and re-writen
without AngularJS.