Compensation action

* adds compensation action to compensation detail view
* adds adding/removing logic for compensation action
* adds bootstrap style to select fields in forms
* refactors UnitEnum into UnitChoices using models.TextChoices (Django 3.x)
* adds translations

konova/enums.py

@@ -18,23 +18,3 @@ class BaseEnum(Enum):
         empty_choice = [] if drop_empty_choice else [(None, "---")]
         choices = empty_choice + [(enum.value, enum.name) for enum in cls]
         return choices
-
-
-class UnitEnum(BaseEnum):
-    """
-    Predefines units for selection
-    """
-    mm = "mm"
-    dm = "dm"
-    cm = "cm"
-    m = "m"
-    km = "km"
-
-    qmm = "qmm"
-    qdm = "qdm"
-    qcm = "qcm"
-    qm = "qm"
-    qkm = "qkm"
-    ha = "ha"
-
-    st = "St."  # pieces