allow for synchronous execution of rendering when renderDelay is null

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@lge.com>
move allowTransitions logic to DataList instead of DataGridList and tie in opacity transition for renderDelay, update CSS

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@lge.com>