Mobile: let the user know if we can't save changes

While the error that caused this to happen should be fixed, we should at least
let the user know if things failed catastrophically and we can't figure out how
to save their data.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

mobile-widgets/qmlmanager.cpp

@@ -1349,6 +1349,7 @@ void QMLManager::saveChangesCloud(bool forceRemoteSync)
 		return;
 
 	if (!m_loadFromCloud) {
+		setNotificationText(tr("Fatal error: cannot save data file. Please copy log file and report."));
 		appendTextToLog("Don't save dives without loading from the cloud, first.");
 		return;
 	}