Change the chapter title to reflect the Tk affinity.

Use the new seealso* environment in the section pointing out other GUI
toolkits.

Doc/lib/tkinter.tex

-\chapter{Graphical User Interface Modules \label{gui}}
+\chapter{Graphical User Interfaces with Tk \label{tkinter}}
 
 \index{GUI}
 \index{Graphical User Interface}
@@ -1741,7 +1741,7 @@ If there are arguments:
 
 There are an number of extension widget sets to \refmodule{Tkinter}.
 
-\begin{seealso}
+\begin{seealso*}
 \seetitle[http://pmw.sourceforge.net/]{Python megawidgets}{is a
 toolkit for building high-level compound widgets in Python using the
 \refmodule{Tkinter} module.  It consists of a set of base classes and
@@ -1765,13 +1765,13 @@ and does not offer the extended range of widgets that \refmodule{Tix} does,
 but does allow a form of  building mega-widgets. The project is
 still in the early stages.
 }
-\end{seealso}
+\end{seealso*}
 
 
 Tk is not the only GUI for Python, but is however the
 most commonly used one.
 
-\begin{seealso}
+\begin{seealso*}
 \seetitle[http://www.wxwindows.org]{wxWindows}{
 is a GUI toolkit that combines the most attractive attributes of Qt,
 Tk, Motif, and GTK+ in one powerful and efficient package. It is
@@ -1817,6 +1817,6 @@ to  \ulink{GNOME}{http://www.gnome.org}, and a
 {http://laguna.fmedic.unam.mx/\~daniel/pygtutorial/pygtutorial/index.html}
 is available.
 }
-\end{seealso}
+\end{seealso*}
 
 % XXX Reference URLs that compare the different UI packages