Unable to remove option from row style

Problem/Motivation

When using UI patterns in a view and adding view fields to the slots of a pattern. If you want to remove a row you can't

Steps to reproduce

Create a view using UI Patterns
Add an option to one of the slots (view field for example)
Save everything
Edit the view and try and remove that option

Proposed resolution

Be able to remove options from the slots

Remaining tasks

User interface changes

API changes

Data model changes