don't need to include button.hxx here

Change-Id: I70ee0546c768271b9eb1d1432de2c9c642c0984a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107133
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

include/vcl/tabctrl.hxx

@@ -205,7 +205,7 @@ public:
     void SetIconClickHdl( Link<NotebookBar*, void> aHdl );
     void SetToolBox( ToolBox* pToolBox );
     ToolBox* GetToolBox() { return m_pShortcuts; }
-    PushButton* GetOpenMenu() { return m_pOpenMenu; }
+    Control* GetOpenMenu();
 
     virtual Size        calculateRequisition() const override;
     static sal_uInt16   GetHeaderHeight();

sfx2/source/notebookbar/NotebookbarTabControl.cxx

@@ -18,7 +18,6 @@
  */
 
 #include <vcl/builderfactory.hxx>
-#include <vcl/button.hxx>
 #include <vcl/layout.hxx>
 #include <vcl/notebookbar.hxx>
 #include <vcl/tabpage.hxx>
@@ -161,7 +160,7 @@ NotebookbarTabControl::~NotebookbarTabControl()
 void NotebookbarTabControl::ArrowStops( sal_uInt16 nCode )
 {
     ToolBox* pToolBox( GetToolBox() );
-    PushButton* pOpenMenu( GetOpenMenu() );
+    Control* pOpenMenu( GetOpenMenu() );
 
     if ( nCode == KEY_LEFT )
     {

vcl/source/control/tabctrl.cxx

@@ -2393,4 +2393,9 @@ Size NotebookbarTabControlBase::calculateRequisition() const
     return TabControl::ImplCalculateRequisition(m_nHeaderHeight);
 }
 
+Control* NotebookbarTabControlBase::GetOpenMenu()
+{
+    return m_pOpenMenu;
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */