BHV-11157: Marquee: 'Marquee on Focus' does not consistently Start

this._marquee_addAnimationStyles(distance); seemed to be called before the deferred creation of the marquee DOM elements could complete. I added a setTimeout to delay adding the styles until after the DOM elements are created.
I wonder if this issue is actually related to the 2.5.0 updates to the rendering scheme, i.e. enyo.HTMLStringDelegate, as this issue didn't appear in 2.3.0-rc.24. @clinuz, any thoughts?