Do not allow resizer to accept focus.

src/toolbars/ToolBar.cpp

@@ -66,6 +66,9 @@ public:
    ToolBarResizer(ToolBar *mBar);
    virtual ~ToolBarResizer();
 
+   // We don't need or want to accept focus.
+   bool AcceptsFocus() const;
+
 private:
    void OnErase(wxEraseEvent & event);
    void OnPaint(wxPaintEvent & event);
@@ -107,6 +110,11 @@ ToolBarResizer::~ToolBarResizer()
 {
 }
 
+bool ToolBarResizer::AcceptsFocus() const
+{
+   return false;
+}
+
 //
 // Handle background erasure
 //