If the user does not select an event type, the event time line reports 'You must to select least one visible layer'. This text should be changed to 'No event types selected.', followed by a new line, then 'Use the Feature and Event selector to choose event types.'
If the user does not select an event type, the event time line reports 'You must to select least one visible layer'. This text should be changed to 'No event types selected.', followed by a new line, then 'Use the Feature and Event selector to choose event types.'