* Add column prefs to the other tables
This adds column prefs to the other remaining report tables.
* Table columns: Override defaults with user prefs.
* table columns: Add remaining analytics tables
* user read/update operation: Combine responses
This combines the response handling for the read and update operations.
* Use X-WP-Total header to set the total number of items in tables
* Improve naming
* Improve tests
* Make getReportItems() return a 'data' property by default
* Make getSummary prop behavior more clear