Woops, can't set overflow:visible on the .dijitTabListWrapper because then you can't set scrollLeft, thus tab scrolling doesn't work.
Woops, can't set overflow:visible on the .dijitTabListWrapper because then you can't set scrollLeft, thus tab scrolling doesn't work.

Rollback part of [27031] and instead fix !TabContainer sizing when initial child is added.   It was calculating the height of the !TabController when the single tab was marked as unselected, rather than selected.   This was inaccurate because in claro selected tabs are taller.

Refs #14164 !strict.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@27034 560b804f-0ae3-0310-86f3-f6aa0a117693

Sam-Cummins/delite,harbalk/delite,kitsonk/delite,kitsonk/delite,harbalk/delite,Sam-Cummins/delite