Demos: Fix custom style tooltip demo

Fixes typo in 'transform' property, also removes unnecessary prefixes (based
on our browser support and caniuse.com data).

Fixes jquery/jqueryui.com#68
Draggable: fix current JSCS violations.
Draggable Tests: fix IE offset tests affected by focus issues.

Calling element.focus() causes scroll in IE. In order to correctly test scroll behavior,
we must rely on the actual calculated offset instead of the helper offset to ensure
cross browser test consistency.
Draggable Tests: fix IE scroll tests affected by focus issues.

Calling element.focus() causes scroll in IE. In order to correctly test scroll behavior,
we must calculate scrollTop on the drag event, before .focus is called.
I18n: Rename all files, removing the "jquery.ui." prefix

Amend fix for 21154cfa2e02ef1814a6aff68b14553bdad165cb;

Ref #9464
Ref gh-1029
I18n: Avoid indenting an entire file

Make code identation consistent with every other source.
Build: Switch to renamed TestSwarm browserSet
Tabs: Removed tabs at bottom demo

Places tabs at the bottom is bad for accessibility. Dynamic content should not
precede the control for the content.