fix figure legend and increase Fig 49 size

Author: simongravelle

figures/REACT-reacting.png

@@ -3990,7 +3990,7 @@ \subsection{Tutorial 8: Reactive Molecular Dynamics}
 
 \begin{figure}
 \centering
-\includegraphics[width=0.7\linewidth]{REACT.png}
+\includegraphics[width=\linewidth]{REACT.png}
 \caption{Initial configuration for \hyperref[bond-react-label]{Tutorial 8}.
 The system consists of 200 styrene molecules packed around a single-walled
 CNT, with a mass density for the whole system of $0.9~\text{g/cm}^3$.}
@@ -4232,7 +4232,7 @@ \subsubsection{Simulating the reaction}
 
 \begin{figure}
 \centering
-\includegraphics[width=0.7\linewidth]{REACT-final.png}
+\includegraphics[width=\linewidth]{REACT-final.png}
 \caption{Final configuration for \hyperref[bond-react-label]{Tutorial 8}.
 The atoms from the formed polymer named \lmpcmd{c1}, \lmpcmd{c2}, and
 \lmpcmd{c3} are colored in pink.}