Use wxTB_DEFAULT_STYLE as default value for wxToolBar style.

No real changes, but this is more consistent with the other controls.

It also highlights the ports which use non-default style, e.g. wxQt where
wxNO_BORDER should probably not be used as part of default toolbar style but
rather added in the ctor implementation.

Closes #16667.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78098 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/toolbar.h

@@ -24,7 +24,7 @@ public:
                wxWindowID id,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
-               long style = wxTB_HORIZONTAL,
+               long style = wxTB_DEFAULT_STYLE,
                const wxString& name = wxToolBarNameStr )
     {
         Init();
@@ -36,7 +36,7 @@ public:
                  wxWindowID id,
                  const wxPoint& pos = wxDefaultPosition,
                  const wxSize& size = wxDefaultSize,
-                 long style = wxTB_HORIZONTAL,
+                 long style = wxTB_DEFAULT_STYLE,
                  const wxString& name = wxToolBarNameStr );
 
     virtual ~wxToolBar();