Change loading animation

app/templates/corpora/analyse_corpus.html.j2

@@ -127,18 +127,8 @@
 <div id="loading-modal" class="modal no-autoinit">
   <div class="modal-content">
     <h4>Waiting for analysis software</h4>
-    <div class="preloader-wrapper big active">
-      <div class="spinner-layer spinner-blue-only">
-        <div class="circle-clipper left">
-          <div class="circle"></div>
-        </div>
-        <div class="gap-patch">
-          <div class="circle"></div>
-        </div>
-        <div class="circle-clipper right">
-          <div class="circle"></div>
-        </div>
-      </div>
+    <div class="progress">
+      <div class="indeterminate"></div>
     </div>
   </div>
 </div>