editor window title improvements

Shows the project name in the window title (good to differentiate multiple instances of Godot with different projects loaded).

Clears the previous scene name from the window title when creating a new scene.

tools/editor/editor_node.cpp

@@ -97,13 +97,14 @@ EditorNode *EditorNode::singleton=NULL;
 
 void EditorNode::_update_title() {
 
+	String appname = Globals::get_singleton()->get("application/name");
+	String title = appname.empty()?String(VERSION_FULL_NAME):String(_MKSTR(VERSION_NAME) + String(" - ") + appname);
 	String edited = edited_scene?edited_scene->get_filename():String();
-
-	String title = edited.empty()?String(VERSION_FULL_NAME):String(_MKSTR(VERSION_NAME) + String(" - ")+edited.get_file());
+	if (!edited.empty())
+		title+=" - " + String(edited.get_file());
 	if (unsaved_cache)
 		title+=" (*)";
 
-
 	OS::get_singleton()->set_window_title(title);
 
 }
@@ -1588,6 +1589,8 @@ void EditorNode::_cleanup_scene() {
 		}
 
 	}
+	
+	_update_title();
 
 }