Rename all the LibGUI classes to GClassName.

LibGUI/GObject.h

@@ -0,0 +1,40 @@
+#pragma once
+
+#include <AK/Vector.h>
+#include <AK/Weakable.h>
+
+class GEvent;
+class GTimerEvent;
+
+class GObject : public Weakable<GObject> {
+public:
+    GObject(GObject* parent = nullptr);
+    virtual ~GObject();
+
+    virtual const char* class_name() const { return "GObject"; }
+
+    virtual void event(GEvent&);
+
+    Vector<GObject*>& children() { return m_children; }
+
+    GObject* parent() { return m_parent; }
+    const GObject* parent() const { return m_parent; }
+
+    void startTimer(int ms);
+    void stopTimer();
+    bool hasTimer() const { return m_timerID; }
+
+    void addChild(GObject&);
+    void removeChild(GObject&);
+
+    void deleteLater();
+
+private:
+    virtual void timerEvent(GTimerEvent&);
+
+    GObject* m_parent { nullptr };
+
+    int m_timerID { 0 };
+
+    Vector<GObject*> m_children;
+};