Project Manager Toolbar Update

- use flow control for projects page for automatic updates when resizing
- made the first time screen only display the first time

Code/Tools/ProjectManager/Source/ScreenHeaderWidget.h

@@ -0,0 +1,42 @@
+/*
+* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
+* its licensors.
+*
+* For complete copyright and license terms please see the LICENSE at the root of this
+* distribution (the "License"). All use of this software is governed by the License,
+* or, if provided, by the license below or the license accompanying this file. Do not
+* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+*
+*/
+
+#pragma once
+
+#if !defined(Q_MOC_RUN)
+#include <QFrame>
+#endif
+
+QT_FORWARD_DECLARE_CLASS(QLabel)
+QT_FORWARD_DECLARE_CLASS(QPushButton)
+
+namespace O3DE::ProjectManager
+{
+    class ScreenHeader 
+        : public QFrame 
+    {
+        Q_OBJECT // AUTOMOC
+
+    public:
+        ScreenHeader(QWidget* parent = nullptr);
+
+        void setTitle(const QString& text);
+        void setSubTitle(const QString& text);
+
+        QPushButton* backButton();
+
+    private:
+        QLabel* m_title;
+        QLabel* m_subTitle;
+        QPushButton* m_backButton;
+    };
+} // namespace O3DE::ProjectManager