Move construction of rootwidget into main startup

core/modules/startup/startup.js

@@ -50,6 +50,14 @@ exports.startup = function() {
 	});
 	// Clear outstanding tiddler store change events to avoid an unnecessary refresh cycle at startup
 	$tw.wiki.clearTiddlerEventQueue();
+	// Create a root widget for attaching event handlers. By using it as the parentWidget for another widget tree, one can reuse the event handlers
+	$tw.rootWidget = new widget.widget({
+		type: "widget",
+		children: []
+	},{
+		wiki: $tw.wiki,
+		document: document
+	});
 	// Set up the syncer object
 	$tw.syncer = new $tw.Syncer({wiki: $tw.wiki});
 	// Host-specific startup