Compensation detail view

* adds compensation detail view (WIP)
* adds includes dir for related objects, similar to interventions
* adds functionality for
   * adding/removing before_states
   * adding/removing after_states
   * adding/removing deadlines
   * adding/removing documents
* refactors usage of BaseModalForm
   * holds now process_request() in base class for generic usage anywhere
* adds __str__() method for some models
* compensation__action is blank=True now
* renamed tooltips
* adds new routes for state/deadline/document handling inside of compensation/urls.py
* adds precalculation of before/after_states for detail view, so users will see directly if there are missing states
* removes unnecessary link for intervention detail payment
* adds missing tooltips for check and record icon on detail views
* refactors DeadlineTypeEnum into DeadlineType in konova/models.py, just as the django 3.x documentation suggests for model enumerations
* UuidModel id field is not editable anymore in the admin interface
* adds/updates translations

konova/models.py

@@ -8,10 +8,10 @@ Created on: 17.11.20
 import os
 import uuid
 
+from django.utils.translation import gettext_lazy as _
 from django.contrib.gis.db.models import MultiPolygonField
 from django.db import models
 
-from konova.enums import DeadlineTypeEnum
 from konova.settings import DEFAULT_SRID
 from user.models import UserActionLogEntry
 
@@ -23,6 +23,7 @@ class UuidModel(models.Model):
     id = models.UUIDField(
         primary_key=True,
         default=uuid.uuid4,
+        editable=False,
     )
 
     class Meta:
@@ -54,17 +55,43 @@ class BaseObject(BaseResource):
         abstract = True
 
 
+class DeadlineType(models.TextChoices):
+    """
+    Django 3.x way of handling enums for models
+    """
+    FINISHED = "finished", _("Finished")
+    MAINTAIN = "maintain", _("Maintain")
+    CONTROL = "control", _("Control")
+    OTHER = "other", _("Other")
+
+
 class Deadline(BaseResource):
     """
     Defines a deadline, which can be used to define dates with a semantic meaning
     """
-    type = models.CharField(max_length=255, null=True, blank=True, choices=DeadlineTypeEnum.as_choices(drop_empty_choice=True))
+
+    type = models.CharField(max_length=255, null=True, blank=True, choices=DeadlineType.choices)
     date = models.DateField(null=True, blank=True)
     comment = models.CharField(max_length=1000, null=True, blank=True)
 
     def __str__(self):
         return self.type
 
+    @property
+    def type_humanized(self):
+        """ Returns humanized version of enum
+
+        Used for template rendering
+
+        Returns:
+
+        """
+        choices = DeadlineType.choices
+        for choice in choices:
+            if choice[0] == self.type:
+                return choice[1]
+        return None
+
 
 class Document(BaseResource):
     """