Canvas2d: adding several methods to move a Primitive at the top or bottom among its siblings.
Canvas2d: adding several methods to move a Primitive at the top or bottom among its siblings.

Temechon/Babylon.js,Kesshi/Babylon.js,abow/Babylon.js,NicolasBuecher/Babylon.js,RaananW/Babylon.js,NicolasBuecher/Babylon.js,jbousquie/Babylon.js,Hersir88/Babylon.js,Kesshi/Babylon.js,NicolasBuecher/Babylon.js,BabylonJS/Babylon.js,Temechon/Babylon.js,Kesshi/Babylon.js,Temechon/Babylon.js,jbousquie/Babylon.js,sebavan/Babylon.js,abow/Babylon.js,Hersir88/Babylon.js,BabylonJS/Babylon.js,jbousquie/Babylon.js,Hersir88/Babylon.js,BabylonJS/Babylon.js,RaananW/Babylon.js,abow/Babylon.js,RaananW/Babylon.js,sebavan/Babylon.js,sebavan/Babylon.js