Improve path handling in Leaflet
Add LeafletListView and corresponding templates
Improve signals using extended register decorator
Use Unipath python module to handle path in settings
Add MediaRemovalMixin for models
Use MediaRemovalMixin in Leaflet model
settings: Revert back from usage of Unipath, use standard os module instead
MediaRemovalMixin: fix: Use MEDIA_ROOT instead of PROJECT_ROOT when deleting media files