Rename tagStreamURL function to tagSearchURL

Since we're not linking to the stream anymore.

h/static/scripts/directive/annotation.js

@@ -413,7 +413,7 @@ function AnnotationController(
     });
   };
 
-  vm.tagStreamURL = function(tag) {
+  vm.tagSearchURL = function(tag) {
     return serviceUrl('search.tag', {tag: tag});
   };
 

h/templates/client/annotation.html

@@ -95,7 +95,7 @@
        ng-if="(vm.canCollapseBody || vm.state().tags.length) && !vm.editing()">
     <ul class="tag-list">
       <li class="tag-item" ng-repeat="tag in vm.state().tags">
-        <a ng-href="{{vm.tagStreamURL(tag)}}" target="_blank">{{tag}}</a>
+        <a ng-href="{{vm.tagSearchURL(tag)}}" target="_blank">{{tag}}</a>
       </li>
     </ul>
     <div class="u-stretch"></div>