Looking to see if possible to use WebDriver for off-canvas and setting_tray related tests
Suggested to solve testing #2944145: [PP-1] Settings Tray prevents editing some fields with QuickEdit module
Hopefully this patch will fix random test failures that have been occurring -- see comment 18 and also #3031842: Random fail in OffCanvasTest. If this issue is ever closed without a patch, we will need to reopen that issue and deal with the random test failures.