Impermanent smart filters

[BBGuy]

Problem/Motivation

All exposed filters should have a heading called Smart Filter we should also create a list of all the filter names and context so if hose are used in other places we have a consistent vocabulary.
@dahacouk - please add any comments if I missed something.

Remaining tasks

• Add Smart Filter to all exposed forms
• Style to give a distinct identity
• create a list of all filter names