improve figure, caption and labels of architecture

30_Thesis/sections/50_design_and_implementation.tex

@@ -23,7 +23,7 @@ Due to these reasons the decision was made to create a new microservice, called
 \begin{figure}
     \centering
     \includegraphics[width=0.6\textwidth]{./figures/50_design_and_implementation/MerlinCollabRecommender.pdf}
-    \caption{Architecture of Collaborative Configurator Merlin with the added recommender system.}
+    \caption{The architecture of the extended recommender system based on \cite[Fig. 4.3]{raabKollaborativeProduktkonfigurationEchtzeit2019}'s configurator (see \autoref{fig:Foundations:CollaborativeConfiguratorMerlin}). The changes include the addition of the component \emph{M.Recommend} and the recommender database. Changes are marked in grey. Components that have a grey background are added and components with a partial grey background undergo changes.}
     \label{fig:DesignImplementation:RecommenderForCollaborativeConfiguratorMerlin}
 \end{figure}