* extends 404 template (user should check the URL)
* introduces new decorator "uuid_required" which performs a check on a given 'uuid' or 'id' parameter
* throws a Http404 exception --> redirect to 404 template instead of 500 error template
* 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'
* updates Django to 4.x and other packages (if possible) to latest versions
* Attention: Requires postgresql >= 12.0
* updates code fragments to match requirements of newer package versions
* simplifies geometries on SimpleGeomForm if threshold GEOM_MAX_VERTICES has been exceeded
* geometry is iteratively simplified to find a proper tolerance value which satisfies the GEOM_MAX_VERTICES threshold
* reduces number of queries performed on detail views of intervention, compensation and eco_account
* renders deductable_rest of eco account beneath progressbar on eco account index view
* clarifies ordering logic of related column
* adds clamping of 3D geometries to 2D geometries if uploaded using the map importer
* extends tests for payment-document linkage
* fixes bug in team-admin selection where autocomplete could not be resolved properly
* adds error message on intervention view if a payment has been added but no document has been uploaded yet
* adds same check to quality checker, meaning no intervention can be recorded which has a payment but no document
* adds trigger for sending data to egon on uploading a document in case of an already existing payment
* adds translations
* enhances visualization of editable column on tables
* simplifies code
* enhances visualization of parcel_group column on tables
* WIP: Ordering on intervention table is odd. Same results are being displayed on page 2. Needs further analysis and fixing!
* disables ordering of parcel_group ("Gemarkung") column on tables
* ordering can not be done properly due to more complex nature of this column's content
* introduces "Keine Geometrie vorhanden" message instead of hour glass icon on entries where no geometry has been entered yet
* properly orders last_modified column by moving null values to the lower end of the ordering
