Filter and Sort Enhancements

This version brings several useful enhancements to the data-admin.

• Fade effect when data is in loading state
• Lots of minor non-breaking code cleanups

Sorting enhancements

• Sorting can now be cleared using the small "x" icon that appears
• Sorting can be disabled on columns using sort: false in the field properties

Filtering enhancements

• Filters can be created on views, but not visible to the user using visible: false in the field properties
• Filters can be pinned, to allow modifying values, but not allowing them to be removed