Add hung bots to sheriff-o-matic view

Tools/GardeningServer/model/ct-failure-group.html

Index: Tools/GardeningServer/model/ct-failure-group.html
diff --git a/Tools/GardeningServer/model/ct-failure-group.html b/Tools/GardeningServer/model/ct-failure-group.html
index 1b8565ef14d3e24aeb82aba86ca37a627b09eade..7b319b4653bee64f8bdc35a14600773b8ff953a8 100644
--- a/Tools/GardeningServer/model/ct-failure-group.html
+++ b/Tools/GardeningServer/model/ct-failure-group.html
@@ -7,10 +7,11 @@ found in the LICENSE file.
 <link rel="import" href="ct-commit-list.html">
 
 <script>
-function CTFailureGroup(key, data) {
+function CTFailureGroup(key, data, category) {
   this.key = key;
   this.data = data;
   this._annotation = CTFailureGroup._mergeAnnotations(data.getAnnotations());
+  this._originalCategory = category || 'default';
   this._computeProperties();
 }
 
@@ -65,7 +66,7 @@ CTFailureGroup.prototype._computeProperties = function() {
     if (this._failedOnce()) {
       this.category = 'failedOnce';
     } else {
-      this.category = 'default';
+      this.category = this._originalCategory;
     }
     // FIXME: crbug.com/400397 Split into: Whole step failure, Tree closer, Test failure, Flaky tests
   }