#99 Admin backend cleanup

* removes admin backend views which are not important for production
* adds filtering functionalities on index views
* simplifies detail views on intervention, compensation, ecoaccount and ema
* adds autocomplete fields on detail views
* adds handy horizontal filter fields on detail views

compensation/models/state.py

@@ -44,4 +44,4 @@ class CompensationState(UuidModel):
     objects = CompensationStateManager()
 
     def __str__(self):
-        return "{} | {} m²".format(self.biotope_type, self.surface)
+        return f"{self.biotope_type} | {self.surface} m²"