Editor: Changed shortcut for hiding helpers to "Esc".

I kinda got used to this behaviour from the htmleditor.

editor/js/ui/Sidebar.Scene.js

@@ -47,7 +47,7 @@ Sidebar.Scene = function ( signals ) {
 
 	} ).setLeft( '100px' ).setWidth( '150px' ).setColor( '#444' ).setFontSize( '12px' ).onChange( updateFogType );
 
-	fogTypeRow.add( new UI.Text().setValue( 'Fog type' ).setColor( '#666' ) );
+	fogTypeRow.add( new UI.Text().setValue( 'Fog' ).setColor( '#666' ) );
 	fogTypeRow.add( fogType );
 
 	container.add( fogTypeRow );

editor/js/ui/Viewport.js

@@ -232,15 +232,15 @@ var Viewport = function ( signals ) {
 
 		switch ( event.keyCode ) {
 
-			case 46: // delete
+			case 27: // esc
 
-				signals.removeSelectedObject.dispatch();
+				signals.toggleHelpers.dispatch();
 
 				break;
 
-			case 72: // h
+			case 46: // delete
 
-				signals.toggleHelpers.dispatch();
+				signals.removeSelectedObject.dispatch();
 
 				break;