put SVG and IMG in special <div>

src/Pages/QuizView.elm

@@ -60,10 +60,10 @@ displayQuestion q =
             Just hint -> LaTeX.Expression.compile hint
             _ -> div [ class "invisible" ] []
         imageDiv = case q.image of
-            Just url -> img [ src url ] [ ]
-            Nothing -> div [ class "invisible" ] []
+            Just url -> div [ class "imgDiv" ] [ img [ src url ] [ ] ]
+            Nothing ->  div [ class "invisible" ] []
         funcDiv = case q.graph of
-            Just gr -> generateSVG {functions =  gr.functions, window = gr.window}
+            Just gr -> div [ class "svgDiv" ] [ generateSVG {functions =  gr.functions, window = gr.window} ]
             Nothing -> div [ class "invisible" ] []
         answerDiv = case q.questionType of
             MCQ x -> displayMCQ q.id x