LDEV-4198: Do not try to get the Floating Activity URL for the progress bar. It does not exist and just results in an error in the log. If isFloating = true then we have come from the progress bar, if isFloating = false we have come from elsewhere in the system and we should get the "broken progress" screen just in case LAMS does try to show to floating activity somewhere.
LDEV-4183: notifyCloseURL was not being passed on when the authoring window was reopened for editing, so the special lesson launch and window close code was not being triggered.