VideoOverview: Optimize attached page pushing
VideoOverview: Optimize attached page pushing

Don't push the page during initial page slide in transition. It has
rather nasty performance on animation performance. Also show the play
button after the page has been pushed.

RobertMe/sailfish-ytplayer,tworaz/sailfish-ytplayer,tworaz/sailfish-ytplayer,tworaz/sailfish-ytplayer,tworaz/sailfish-ytplayer,RobertMe/sailfish-ytplayer,RobertMe/sailfish-ytplayer,RobertMe/sailfish-ytplayer,tworaz/sailfish-ytplayer,RobertMe/sailfish-ytplayer