Tabs: Prevent opening a tab while panels are being animated. Fixes #4771 - Tabs: Occassionally displays multiple tabs when clicked with rotate control using opacity toggle fx.
Tabs: Prevent opening a tab while panels are being animated. Fixes #4771 - Tabs: Occassionally displays multiple tabs when clicked with rotate control using opacity toggle fx.

GrayYoung/jQuery.UI.Extension,GrayYoung/jQuery.UI.Extension