GUI-1442: Rework S3 sharing panel form fields and layout
GUI-1442: Modify ACL update logic based on revamped sharing panel form fields
GUI-1442: Remove ACL propagation warning modal; display propagation checkbox in sharing panel only on bucket details page
GUI-1442: Add unit tests for various S3 forms, panels and views
GUI-1442: Handle assigning ACLs to canned groups in sharing panel
GUI-1442: Add bucket owner option for ACLs in revamped sharing panel
GUI-1442: Implement Make Object Public dialog on bucket contents and object details page.  Consolidate delete item and make public dialogs
Made "Permission" label singular, added title to Make Object Public dialog.
Merge pull request #1156 from eucalyptus/GUI-1442

GUI-1442: Revamped S3/ObjectStorage sharing panel