MINOR: ISSUE-19 CWP Accessibility fixes - Added macron to Māori toggle button for translations on the CWP demo site.
Merge pull request #2320 from jbridson/3.1

MINOR: ISSUE-19 CWP Accessibility fixes - Added macron to Māori toggle b...
BUG: Context menu too long - CSS only (Fixes CMS #811)
Fixed behat tests to confirm file deletion dialog
Fixed behat tests for confirming grid field dialogs
Merge remote-tracking branch 'origin/3.1.0' into 3.1