Konova code improvements

* improves rendering of codes as string (short names will be used if existing)
* reduces selectable konova codes to leafs (as discussed with experts)
* automatically resizes the width of modal form fields to w-100
* adds/updates translations

compensation/models.py

@@ -11,6 +11,7 @@ from django.core.validators import MinValueValidator
 from django.db.models import Sum
 from django.utils.translation import gettext_lazy as _
 
+from codelist.models import KonovaCode
 from intervention.models import Intervention, ResponsibilityData
 from konova.models import BaseObject, BaseResource, Geometry, UuidModel
 from konova.settings import DEFAULT_SRID_RLP, LANIS_LINK_TEMPLATE
@@ -22,7 +23,7 @@ class Payment(BaseResource):
     Holds data on a payment for an intervention (alternative to a classic compensation)
     """
     amount = models.FloatField(validators=[MinValueValidator(limit_value=0.00)])
-    due_on = models.DateField(null=True)
+    due_on = models.DateField(null=True, blank=True)
     comment = models.CharField(
         max_length=1000,
         null=True,
@@ -42,7 +43,12 @@ class CompensationState(UuidModel):
     """
     Compensations must define the state of an area before and after the compensation.
     """
-    biotope_type = models.CharField(max_length=500, null=True, blank=True)
+    biotope_type = models.ForeignKey(
+        KonovaCode,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True
+    )
     surface = models.FloatField()
 
     def __str__(self):
@@ -65,7 +71,12 @@ class CompensationAction(BaseResource):
     """
     Compensations include actions like planting trees, refreshing rivers and so on.
     """
-    action_type = models.CharField(max_length=500, null=True, blank=True)
+    action_type = models.ForeignKey(
+        KonovaCode,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True
+    )
     amount = models.FloatField()
     unit = models.CharField(max_length=100, null=True, blank=True, choices=UnitChoices.choices)
     comment = models.TextField(blank=True, null=True, help_text="Additional comment")