* drops identifier handling on all edit-forms (identifier editing has been disabled on the frontend for a while now)
* updates test cases
* updates form caption for checking and recording action (less intimidating)
* optimizes district column width
* fixes bug on frontend parcel fetching on detail view
* adds extended tooltip for title column on index tables
* retraslates 'Law' to 'Rechtsgrundlage'
* refactors intervention/forms and ../modalForms into individual files in separated packages
* forms.py has been renamed into intervention.py, now can be found as intervention/forms/intervention.py
* modalForms.py has been split into individual files living in modals package, can be found as intervention/forms/modals/...
