Add support for FeatureCollections -> MultiPolygon
Add support for FeatureCollections -> MultiPolygon

* Fixes a bug that prevented saving the project when
using the "Delineate Watershed" tool to generate
an Area of Interest.

kdeloach/model-my-watershed,kdeloach/model-my-watershed,project-icp/bee-pollinator-app,kdeloach/model-my-watershed,project-icp/bee-pollinator-app,WikiWatershed/model-my-watershed,mmcfarland/model-my-watershed,lliss/model-my-watershed,WikiWatershed/model-my-watershed,project-icp/bee-pollinator-app,mmcfarland/model-my-watershed,mmcfarland/model-my-watershed,lliss/model-my-watershed,kdeloach/model-my-watershed,WikiWatershed/model-my-watershed,WikiWatershed/model-my-watershed,mmcfarland/model-my-watershed,kdeloach/model-my-watershed,project-icp/bee-pollinator-app,mmcfarland/model-my-watershed,WikiWatershed/model-my-watershed,lliss/model-my-watershed,lliss/model-my-watershed,lliss/model-my-watershed