Added ttles to default plots

templates/mat_test_clinician_end.html

@@ -4,7 +4,7 @@
     <div class="container p-0">
         <div class="row">
             <div class="col p-0 m-0">
-                <img id="mat_plot" src="/static/default_plot.png" width="100%"/>
+                <img id="mat_plot" src="/static/default_adaptive_plot.png" width="100%"/>
             </div>
             <div class="col p-0 m-0">
                 <img id="mle_plot" src="/static/default_mle_plot.png" width="100%"/>

templates/mat_test_clinician_view.html

@@ -2,7 +2,7 @@
 {% block content %}
 <div>
     <div style="height: 75%;">
-        <img id="mat_plot" class="center" src="/static/default_plot.png"/>
+        <img id="mat_plot" class="center" src="/static/default_adaptive_plot.png"/>
     </div>
     <div class="d-flex justify-content-center mt-2" role="group">
         <button type="button" id="mat-repeat" class="btn btn-primary mx-3">Repeat audio</button>