This is the first step of making the resource browser, related to
blueprint swift-ui-improvements.
Adds three attrs to DataTableOptions:
.. attribute:: mixed_data_type
.. attribute:: data_types
.. attribute:: data_type_name
Adds attr to Column class:
.. attribute:: allowed_data_types
Adds attr to Action and LinkAction class:
.. attribute:: allowed_data_types
Changes implentation of FilterAction.
Adds MixedDataTableView.
Change-Id: I45fce5e889e92abc592f0a5abfef1abb4ce527be
6ba1a4d395