Payments add modal form

* adds help texts to add payment form
* adds removing button for payments
* refactors user fetching into BaseForm
* adds generic RemoveModalForm which is intended to be used for every modal form which shall remove something
* adds translations
* removes unused html
* prepares payment amount field to be able to process german inputs like '1.000,50' which is not the international default

compensation/forms.py

@@ -20,15 +20,18 @@ class NewCompensationForm(BaseForm):
 
 
 class NewPaymentForm(BaseModalForm):
-    amount = forms.FloatField(
-        min_value=0.01,
+    amount = forms.DecimalField(
+        min_value=0.00,
+        decimal_places=2,
         label=_("Amount"),
         label_suffix=_(""),
+        help_text=_("Amount in Euro"),
+        localize=True,
     )
     due = forms.DateField(
-        required=False,
         label=_("Due on"),
         label_suffix=_(""),
+        help_text=_("Due on which date"),
         widget=forms.DateInput(
             attrs={
                 "type": "date",
@@ -41,14 +44,13 @@ class NewPaymentForm(BaseModalForm):
         max_length=1000,
         required=False,
         label_suffix=_(""),
-        label=_("Transfer note")
+        label=_("Transfer note"),
+        help_text=_("Note for money transfer")
     )
 
     def __init__(self, *args, **kwargs):
-        self.user = kwargs.pop("request", None).user
-        self.intervention = kwargs.pop("intervention", None)
         super().__init__(*args, **kwargs)
-
+        self.intervention = self.instance
         self.form_title = _("Payment")
         self.form_caption = _("Add a payment for intervention '{}'").format(self.intervention.title)