TimeLine disappears when clicking onto a long Event
Indeed, to reproduce the issue, one-up the "Basic Demo" (Scheduler)
Then :
1) Change the view (Zoom) to see Preset "Day"
2) Create an Event that lasts at least 3 month
3) Then Issues :
a) when you click on the Event then Timeline disappears
b) when you double click on the Event then the Timeline disappears and the eventEditor is opened for a new event
(have a glace at the screenshot)
