Fix how !ContentPane removes the title attribute from this.domNode if it happens to be set.
Fix how !ContentPane removes the title attribute from this.domNode if it happens to be set.

Also, stop setting title attribute on Dialog.titleBar.   It seems useless.

Fixes #16635 on trunk, !strict.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@30491 560b804f-0ae3-0310-86f3-f6aa0a117693

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