rename dicom-element to dicom-image (consistent with RTS)

anatomy/templates/anatomy/exam.html

@@ -41,7 +41,7 @@
 <table>
     <tr>
         <td>
-            <div id="dicom-element" data-url="{{ question.image.url}}" />
+            <div id="dicom-image" data-url="{{ question.image.url}}" />
             </div>
 
             <form method="POST" class="post-form">{% csrf_token %}

anatomy/templates/anatomy/mark.html

@@ -4,7 +4,7 @@
 <h2>Marking question {{question_details.current}} of {{question_details.total}}</h2>
 <p>{{ question.question_type }}</p>
 
-<div id="dicom-element" data-url="{{ question.image.url}}" />
+<div id="dicom-image" data-url="{{ question.image.url}}" />
 </div>
 <div class="marking">
 <form method="POST" class="post-form">{% csrf_token %}

anatomy/templates/anatomy/question_detail.html

@@ -1,7 +1,7 @@
 {% extends 'anatomy/base.html' %}
 
 {% block content %}
-<div id="dicom-element" data-url="{{ question.image.url}}" />
+<div id="dicom-image" data-url="{{ question.image.url}}" />
 <div class="question">
     <div class="date">
         {{ question.created_date }}