rename to viewFullscreen

editor/js/Fullscreen.js

-var launchIntoFullscreen = function ( element ) {
+var viewFullscreen = function ( element ) {
 
 	if (element.requestFullscreen) {
 		element.requestFullscreen();

editor/js/Menubar.View.js

@@ -52,7 +52,7 @@ Menubar.View = function ( editor ) {
 	option.setTextContent( 'Fullscreen' );
 	option.onClick( function () {
 
-		launchIntoFullscreen(document.body);
+		viewFullscreen(document.body);
 
 	} );
 	options.add( option );