Add custom filter to bot-list and task-list

appengine/swarming/elements/res/imp/common/common-behavior.html

Index: appengine/swarming/elements/res/imp/common/common-behavior.html
diff --git a/appengine/swarming/elements/res/imp/common/common-behavior.html b/appengine/swarming/elements/res/imp/common/common-behavior.html
index e3be6b539fd213a57a6b87192bd2e37cfaafa761..60ad8b773a54cd4cfee025614c4d326b3e367bf0 100644
--- a/appengine/swarming/elements/res/imp/common/common-behavior.html
+++ b/appengine/swarming/elements/res/imp/common/common-behavior.html
@@ -108,11 +108,19 @@
         return result;
       },
 
-      _taskLink: function(task_id) {
-        if (!task_id) {
+      _taskLink: function(taskId, disableCanonicalID) {
+        if (!taskId) {
           return undefined;
         }
-        return "/newui/task?id=" + task_id;
+        if (!disableCanonicalID) {
+          // task abcefgh0 is the "canonical" task id. The first try has the id
+          // abcefgh1. If there is a second (transparent retry), it will be
+          // abcefgh2.  We almost always want to link to the canonical one,
+          // because the milo output (if any) will only be generated for
+          // abcefgh0, not abcefgh1 or abcefgh2.
+          taskId = taskId.substring(0, taskId.length - 1) + "0";
+        }
+        return "/newui/task?id=" + taskId;
       },
 
       // _timeDiffApprox returns the approximate difference between now and