Filter Product by Attribute - option to not Layer results
Filter Products by Attribute widget should have checkbox to toggle the 'layered' feature of the filter. The idea is to [optionally] have the select list persist with ALL available attributes even after a filter has been applied.
Presently, the Filter select list is limited to Attributes present in products returned by the current filter.
For example, if there is only one t-shirt in my shop sold in 'small' and user selects 'small' from the filter they will see just the one shirt (good). However, the filter's select-list will now offer only 'small' and unless they know to REMOVE the filter (which they don't) then they can no longer find 'medium' shirts.
I see the benefits of this filter for both use cases - layered and not layered - and think a checkbox to enable/disable would be a nice feature.