don't close energy graph dialog on click, see phetsims/sun#427

Author: jessegreenberg

js/common/view/EnergyGraphNode.js

@@ -15,7 +15,6 @@ define( function( require ) {
   var AlignBox = require( 'SCENERY/nodes/AlignBox' );
   var AlignGroup = require( 'SCENERY/nodes/AlignGroup' );
   var BarChartNode = require( 'GRIDDLE/BarChartNode' );
-  var ButtonListener = require( 'SCENERY/input/ButtonListener' );
   var ClearThermalButton = require( 'SCENERY_PHET/ClearThermalButton' );
   var Color = require( 'SCENERY/util/Color' );
   var ColorConstants = require( 'SUN/ColorConstants' );
@@ -247,11 +246,6 @@ define( function( require ) {
           } );
         }
 
-        // close it on a click
-        var closeListener = new ButtonListener( {
-          fire: dialog.hide.bind( dialog )
-        } );
-        dialog.addInputListener( closeListener );
         dialog.show();
       }
     } );