Adding new features with null attribute fields fails

[woodbri]

When you add new features to a featureserver datasource any integer fields that are empty are treated as a string "" and fail the PUT request. Empty fields should be treated as NULL. Maybe the right thing to do is filter out those fields before making the request. This does not work for edits because you might want to actually change a field with a value to a null.

Also, this error is NOT handled by the UI and there is no clean up or appropriate error displayed to the user.

[adube]

This seems like an important issue, so I'm putting it in 1.1.0.

[adube]

Feature editing won't be 1.2 objectives. Pushed to 1.4.

[adube]

No patch, pushed to 1.6.

[adube]

No patch, pushed to 1.8.