[UI] namespacing (events and data)

[scott.gonzalez]

All UI plugins should store their instances as:

$(el).data('<plugin>');

not:

$(el).data('ui-<plugin>');

All bound events, including setData and getData should be in the "<plugin>" namespace, not "ui-<plugin>".

The only place "ui-<plugin>" will be used is in CSS to prevent collisions with common class names.

[scott.gonzal]

Fixed in [4966].