Add that it is deprecated, but kept for compatibility reasons.

Closes modelica#2346

chapters/annotations.tex

@@ -667,7 +667,7 @@ \subsection{Connections}\doublelabel{connections1}
 
 The textColor attribute defines the color of the text. The text is drawn
 with transparent background and no border around the text (and without
-outline). The contents inherited from FilledShape is deprecated.
+outline). The contents inherited from FilledShape is deprecated, but kept for compatibility reasons.
 The default value for \lstinline!horizontalAlignment! is deprecated.
 Having a zero size for the extent is deprecated and is handled as if upper part is moved up an appropriate amount.
 
@@ -814,7 +814,7 @@ \subsubsection{Text}\doublelabel{text}
 \end{lstlisting}
 The \lstinline!textColor! attribute defines the color of the text. The text is drawn
 with transparent background and no border around the text (and without
-outline). The contents inherited from \lstinline!FilledShape! is deprecated.
+outline). The contents inherited from \lstinline!FilledShape! is deprecated, but kept for compatibility reasons.
 
 There are a number of common macros that can be used in the text, and
 they should be replaced when displaying the text as follows: