(bug 44744) copyright tooltip will now always be shown

Even if an error tooltip appears on the save button, the copyright tooltip will still be shown.
For this to work, the copyright tooltip now is appended to a new toolbar element, only appended
whenever global edit mode gets triggered.

patch set 4: some cleanup

Change-Id: Ic0ecf1b75717cf3a6eb7f6cfe2df3be50126a297