Say "a dialog is shown" instead of "a menu pops up"

Preferring "is shown" over "pops up", since the former is more general.

chapters/annotations.tex

@@ -1415,7 +1415,7 @@ \section{Annotations for the Graphical User Interface}\label{annotations-for-the
   $\ldots$
 end DialogDemo;
 \end{lstlisting}
-When clicking on an instance of model \lstinline!DialogDemo!, a menu pops up that may have the following layout (other layouts are also possible, this is vendor specific).
+When clicking on an instance of model \lstinline!DialogDemo!, a dialog is shown that may have the following layout (other layouts are also possible, this is vendor specific).
 
 \begin{center}
 \includegraphics[scale=0.5]{disabledparameter}