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/views/compensation_views.py

@@ -118,7 +118,7 @@ def log_view(request: HttpRequest, id: str):
 
     context = {
         "modal_body_template": body_template,
-        "log": comp.log.all().order_by("-timestamp"),
+        "log": comp.log.all(),
         "modal_title": _("Log"),
     }
     context = BaseContext(request, context).context