Generic wxHyperlinkCtrl appearance and behaviour improvements.

Show focus rectangle around the control when it has focus. Also handle the
space key to trigger the link.

Also allow using either the native or generic version of the class in the
widgets sample.

Closes #11285.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67948 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/hyperlink.h

@@ -75,6 +75,12 @@ protected:
     // Renders the hyperlink.
     void OnPaint(wxPaintEvent& event);
 
+    // Handle set/kill focus events (invalidate for painting focus rect)
+    void OnFocus(wxFocusEvent& event);
+
+    // Fire a HyperlinkEvent on space
+    void OnChar(wxKeyEvent& event);
+
     // Returns the wxRect of the label of this hyperlink.
     // This is different from the clientsize's rectangle when
     // clientsize != bestsize and this rectangle is influenced