Add tile windows feature (#14583)

Support tiling and maximizing views

ApplicationLibCode/UserInterface/RiuMainWindowBase.h

@@ -135,11 +135,17 @@ protected slots:
     void saveDockLayout();
     void exportDockLayout();
 
+    void tileViewWindows();
+    void maximizeViewWindows();
+
 protected:
     bool m_allowActiveViewChangeFromSelection; // To be used in selectedObjectsChanged() to control
                                                // whether to select the corresponding active view or not
 
-    QAction*   m_hideTabsAction;
+    QAction* m_hideTabsAction;
+    QAction* m_tileWindowsAction;
+    QAction* m_maximizeWindowsAction;
+
     QAction*   m_undoAction;
     QAction*   m_redoAction;
     QUndoView* m_undoView;