Pressing tab in the inspector does not move to the next field for styles

Steps to reproduce:

1. Create a new project.

2. Open UI Builder and add any element

3. Select 1 of the style fields to change, e.g Size - Width.

4. Press tab. Nothing happens

Actual results: Editing of the field stops but the field is still selected

Expected results: The next field is selected for editing. In this case the Width field. 

Reproducible with versions: 6.0b13

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): 

Notes:

• This works for the serialized attribute fields.