In some cases, the footer in a form view dialog could be duplicated.
The reason was that the form view was rerendered completely, footer
included, by the renderer, out of the formcontroller control (it is the
formcontroller's job to move the footer buttons to the footer).
A possible fix is to work on the form renderer to make it aware that the footer
buttons are expected to be only rendered once, but it has the disadvantage to
be a fix specific to this issue, and any other form view behaviour with some
side effects may have the same issue.
This commit tries to prevent the form view from rerendering itself
completely in those cases. This also has the disadvantage of possibly
not being a complete fix, if some edge cases are missed. However, I
have the feeling that we still want to avoid rerendering the full view
if possible.
Géry Debongnie
132137939c