Edit Brew not saving when Bottle Date is populated

[oboyle]

The Edit Brew feature is not saving the data modified anywhere in the form if Bottle Date contains a value.

Reproduce by:

1. Brew a recipe, then editing the brew.
2. Update any field other than bottle date, save, and verify the field is updated.
3. Update the bottle date, save, and verify the field is not updated.
4. Update the bottle date and any other field, and verify neither have been updated.