Intern dgrid/editor test:
* remove unnecessary IIFE (since loop body is not async)
Intern dgrid/editor tests:
* add canEdit test
Intern dgrid-editor tests:
* fix escape test to click cell (instead of row)
Intern dgrid/editor tests
* update test page to provide always-on and click-to-edit columns
* update escape tests to accomodate test page changes
Intern dgrid/editor tests
* add dgrid-datachange event functional test
Intern dgrid/editor tests:
* start configuring test page for autoSave