* [Explore view] Use POST method for charting requests
* fix per code review comments
* more code review fixes
* code review fix: remove duplicated calls for getting values from request
* [Explore view] Use POST method for charting requests
* fix per code review comments
* more code review fixes
* code review fix: remove duplicated calls for getting values from request
* rename spec folder
* remove special handling for viz_type control since it now uses VizTypeControl
* add test for getOptions
* linting
* add test for cwp
* linting