Merge pull request #925 from isuftin/master

Code cleanup and unifying property getting via enums
Merge pull request #926 from isuftin/master

Uploaded file zips are now persisted to geoserver/database using zip name instead of the names of the internal  items
Merge pull request #927 from isuftin/master

Fixed layer removal functionality
Merge pull request #928 from isuftin/master

Baseline drawing fix.
Code cleanup
Upload file cleanup

If cancelling a shoreline upload at the point of matching columns, the application will now delete the uploaded file(s) on the back-end via token. This provides some protection against cluttering the disk with orphaned files