updated so clear fires change event

[gammonpeter]

No description provided.

[jamesrwelch]

Now getting:

Schema validation failed with the following errors:
  Data path "/polyfills" must be string.

On this branch... what have I done wrong?

[pjmonks]

I have tested this and have no issue with the UI now. I did find a related error in mdm-core though which prevents you from filtering searches when setting the "Last Updated - To" date filter - this is recorded in MauroDataMapper/mdm-core#230. I think that is separate though, since changing the filter field does trigger the search again, which is what this PR is meant to fix.