EMA

* adds Ema model (basically Compensation inherited)
* adds index view for EMAs
* fixes drop-down link bug for menu 'More' in navbar
* refactors some more forms to use process_request()
* adds modified attribute to BaseResource for easy last_modified check
* adds setting of modified attribute in all places where UserAction.EDITED is added to log
* adds EMA_ACCOUNT_IDENTIFIER_LENGTH and EMA_ACCOUNT_IDENTIFIER_TEMPLATE to ema/settings.py
* adds EmaAdmin to ema/admin.py
* fixes wrong title in intervention detail view html for revocations
* adds support for subtitle variable to BaseTable and generic_index.html
* drops next_version attribute from models
* adds/updates translations
* adds default ordering for UserActionLogEntry
   * removes extra ordering in log modal rendering

compensation/forms.py

@@ -89,6 +89,8 @@ class NewPaymentForm(BaseModalForm):
                 intervention=self.intervention,
             )
             self.intervention.log.add(edited_action)
+            self.intervention.modified = edited_action
+            self.intervention.save()
             return pay
 
 
@@ -122,6 +124,8 @@ class NewStateModalForm(BaseModalForm):
                 comment=_("Added state")
             )
             self.instance.log.add(user_action)
+            self.instance.modified = user_action
+            self.instance.save()
 
             state = CompensationState.objects.create(
                 biotope_type=self.cleaned_data["biotope_type"],
@@ -244,6 +248,8 @@ class NewDeadlineModalForm(BaseModalForm):
                 action=UserAction.EDITED,
                 comment=_("Added deadline")
             )
+            self.instance.modified = edited_action
+            self.instance.save()
             self.instance.log.add(edited_action)
             self.instance.deadlines.add(deadline)
         return deadline
@@ -314,6 +320,8 @@ class NewActionModalForm(BaseModalForm):
                 action=UserAction.EDITED,
                 comment=_("Added action"),
             )
+            self.instance.modified = edited_action
+            self.instance.save()
             self.instance.log.add(edited_action)
             self.instance.actions.add(comp_action)
         return comp_action