GF-54890-defect Fixed

issue: Panels are not displaying after using popPanel()
cause: in moon.Panels ,popPanels() method destroys all the panels equal
or greater than the specified index without setting the index to a
correct value.
solution:  index value is set  before destroying the panels.
Enyo-DCO-1.1-Signed-off-by: RajyavardhanP <rajyavardhan.p@lge.com>