Template enhancements

* adds configurable label-input ratio setting for forms and specializes for RemoveModalForm
* enhances form body html structure for better UX and usage of label-input ratio

konova/forms/base_form.py

@@ -29,6 +29,7 @@ class BaseForm(forms.Form):
     form_attrs = {}  # Holds additional attributes, that can be used in the template
     has_required_fields = False  # Automatically set. Triggers hint rendering in templates
     show_cancel_btn = True
+    label_input_ratio = (3, 9)  # used for col-sm-xy in the template. Must sum up to 12. Specify on inheriting forms
 
     def __init__(self, *args, **kwargs):
         self.instance = kwargs.pop("instance", None)
@@ -42,12 +43,26 @@ class BaseForm(forms.Form):
                 break
 
         self.check_for_recorded_instance()
+        self.__check_valid_label_input_ratio()
 
     @abstractmethod
     def save(self):
         # To be implemented in subclasses!
         pass
 
+    def __check_valid_label_input_ratio(self):
+        """ Checks whether the configured label-input ratio is valid
+
+        If not valid an AssertionError will be raised.
+        The valid sum of label-input ratio is defined by bootstrap's column layout system.
+
+        Returns:
+
+        """
+        ratio = self.label_input_ratio[0] + self.label_input_ratio[1]
+        if ratio != 12:
+            raise AssertionError(f"Label-input ratio on form must sum up to 12! It's {self.label_input_ratio}")
+
     def disable_form_field(self, field: str):
         """
         Disables a form field for user editing

konova/forms/modals/remove_form.py

@@ -24,6 +24,7 @@ class RemoveModalForm(BaseModalForm):
         widget=forms.CheckboxInput(),
         required=True,
     )
+    label_input_ratio = (2, 10)
 
     def __init__(self, *args, **kwargs):
         self.template = "modal/modal_form.html"