created doc to help find best solution for Rock DateTime issues
Update the "Other Data View" and "Property Filter" data view filters to be work for any entity instead of being an abstract class that required a concret implementation class for each entity.  Update code generation project to remove generation of filter classes.

Also created RockDropDownList control that will persist the grouping of items in a dropdown list after a postback
Renamed file
More Updates to PropertyFilter data view filter
Fix to exceptions
Person details work
Person details changes
CSS Fix
Implementing R# suggestions.
Merge branch 'develop' of github.com:SparkDevNetwork/Rock-ChMS into develop
Merge branch 'develop' into feature-jo-pledges
Adding FieldTypes and Attributes for Accounts singular and plural. More JS cleanup and beginning multi-select ItemPicker implementation.