* fixes a bug where validation check of payment 'due' has not been triggered properly
* adds validator to make sure no dates like `01.01.1` can be accepted. All dates must be somewhat later than 01.01.1950
* splits compensation/forms.py and /modalForms.py into individual files inside new packages * general forms stay in new files in compensation/forms * modal forms stay in new files in compensation/forms/modals