Minor improvements of task list

appengine/swarming/elements/res/imp/tasklist/task-list-data.html

 <!--
   Copyright 2016 The LUCI Authors. All rights reserved.
   Use of this source code is governed under the Apache License, Version 2.0
   that can be found in the LICENSE file.
 
   This in an HTML Import-able file that contains the definition
   of the following elements:
 
     <bot-list-data>
 
@@ skipping 149 matching lines @@
         tasks.forEach(function(t) {
           Object.keys(t.tagMap).forEach(function(k) {
             var v = t.tagMap[k];
             if (!map[k]) {
               map[k] = {};
             }
             map[k][v] = true;
           });
         });
 
+        delete map["user"][""];
+        map["user"]["none"] = true;
+
         // Turn the Map<Object,Map<Boolean>> into a Map<Object,Array<String>>
         // with all of the aliases applied.
         var pMap = {};
         for (key in map) {
           var values = Object.keys(map[key]);
           if (swarming.alias.DIMENSIONS_WITH_ALIASES.indexOf(key) === -1) {
             pMap[key] = values;
           } else {
             var aliased = [];
             values.forEach(function(value){
               aliased.push(swarming.alias.apply(value, key));
             });
             pMap[key] = aliased;
           }
         }
 
-        // Add some options that might not show up.
-        pMap["android_devices"].push("0");
-        pMap["device_os"].push("none");
-        pMap["device_type"].push("none");
-        pMap["user"].push("none");
-
         // Custom filter options
         pMap["name"] = [];
         // Some of these are hard coded because the server expects something
         // like "DEDUPED" instead of the more human friendly
         // "COMPLETED (DEDUPED)"
         pMap["state"] = [this.PENDING, this.RUNNING, "PENDING_RUNNING", this.COMPLETED,
             "COMPLETED_SUCCESS", "COMPLETED_FAILURE", this.EXPIRED, this.TIMED_OUT,
             this.BOT_DIED, this.CANCELED, "DEDUPED", "ALL"];
         pMap["costs_usd"] = [];
         pMap["deduped_from"] = [];
         pMap["duration"] = [];
         pMap["server_versions"] = [];
+
+        // TODO(kjlubick): Allow a person to sort on the task list by bot
+        pMap["bot"] = [];
         TIMES.forEach(function(t) {
           pMap[t] = [];
         });
 
         return pMap;
       },
 
       _request: function() {
         // wait until the user has logged in and the filters have loaded before requesting this to avoid double or even triple requests.
         if (!this.auth_headers || !this.query_params) {
@@ skipping 35 matching lines @@
           if (t.duration){
             t.human_duration = this._humanDuration(t.duration);
           }
         }.bind(this));
         return this._list.items;
       }
     });
   })();
   </script>
 </dom-module>