trigger postProcess hook on inline edit save

postProcess is not getting called when an inline edit form is saved.
I think this is pretty easy to implement. The issue is that for inline edit we handle the updates, return a json response, and exit – so it doesn't get to the parent postProcess where the hook is called.

but if we just add: $this->postProcessHook();
– before the response and exit, within each inline edit form's postProcess function, we achieve what we need.

for example, in CRM_Contact_Form_Inline_Demographics::postProcess() – I added the above before $response and it correctly passes to the hook.