mpeltriaux f4541abf20 #50 Overlaying geometries ... * refactors geometry field into GeoReferencedMixin, holding more handy methods and used in all models, formerly holding the geometry field * refactors backend admin configuration, so modified, deleted and created are not editable in the backend which also skips loading of all possible choices * fixes typo in sanitize_db command * introduces GeometryConflict model, holding a link between two geometries, where one overlaps the other * adds first (WIP) messages into detail views of ema and intervention for test purposes		2021-12-15 13:59:52 +01:00
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commands	#50 Overlaying geometries	2021-12-15 13:59:52 +01:00