typeahead: Show stream privacy icons in typeahead options.

We now show the stream privacy icons along with their names
in the typeahead options.

web/src/typeahead_helper.js

@@ -123,8 +123,8 @@ export function render_stream(stream) {
     }
 
     return render_typeahead_item({
-        primary: stream.name,
         secondary: desc,
+        stream,
         is_unsubscribed: !stream.subscribed,
     });
 }

web/templates/typeahead_list_item.hbs

@@ -18,7 +18,11 @@
     <i class="typeahead-image icon fa fa-group no-presence-circle" aria-hidden="true"></i>
 {{/if}}
 <strong>
-    {{~ primary ~}}
+    {{~#if stream}}
+        {{> inline_decorated_stream_name stream=stream }}
+    {{else}}
+        {{~ primary ~}}
+    {{/if}}
 </strong>
 {{~#if has_status}}
 {{> status_emoji status_emoji_info}}

web/tests/typeahead_helper.test.js

@@ -722,7 +722,7 @@ test("render_stream", ({mock_template}) => {
     };
 
     mock_template("typeahead_list_item.hbs", false, (args) => {
-        assert.equal(args.primary, stream.name);
+        assert.equal(args.stream, stream);
         assert.equal(args.secondary, stream.description);
         rendered = true;
         return "typeahead-item-stub";
@@ -741,7 +741,7 @@ test("render_stream w/long description", ({mock_template}) => {
     };
 
     mock_template("typeahead_list_item.hbs", false, (args) => {
-        assert.equal(args.primary, stream.name);
+        assert.equal(args.stream, stream);
         const short_desc = stream.description.slice(0, 35);
         assert.equal(args.secondary, short_desc + "...");
         rendered = true;