Add wxToolBar::GetToolByPos() method to access tools by their index.

This is a trivial accessor which somehow was never added before even though we
had GetToolsCount() and even DeleteToolByPos().

Closes #11120.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64004 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/toolbar.h

@@ -438,6 +438,17 @@ public:
     */
     virtual wxSize GetToolBitmapSize() const;
 
+    /**
+        Returns a pointer to the tool at ordinal position @a pos.
+
+        Don't confuse this with FindToolForPosition().
+
+        @since 2.9.1
+
+        @see GetToolsCount()
+    */
+    const wxToolBarToolBase *GetToolByPos(int pos) const;
+
     /**
         Get any client data associated with the tool.