ENYO-3227: Recalculate metrics on showing
ENYO-3227: Recalculate metrics on showing

Issue:
NewThumb is measure bounds of its parent on render time to determine
minSizeRatio and naturalSize. If list is initially hidden and show
later, these metrics are not updated.

Fix:
Call calculateMetrics in showingChangedHandler on showing.

Enyo-DCO-1.1-Signed-off-by: Kunmyon Choi kunmyon.choi@lge.com

Small tweak to super call and calc placement

Enyo-DCO-1.1-Signed-off-by: Roy Sutton roy.sutton@lge.com

Check getAbsoluteShowing instead of showing

PKRoma/enyo,PKRoma/enyo,enyojs/enyo,enyojs/enyo