Scope mobile Search by repository

frontend/index.html

@@ -443,6 +443,10 @@
       <option value="open">Open</option>
       <option value="closed">Closed</option>
     </select>
+    <label for="cmd-search-repository">Repository</label>
+    <input id="cmd-search-repository" type="search" list="cmd-search-repositories" autocomplete="off" placeholder="All repositories" aria-describedby="cmd-repository-status" />
+    <datalist id="cmd-search-repositories"></datalist>
+    <span id="cmd-repository-status" class="cmd-repository-status" aria-live="polite"></span>
   </fieldset>
   <div id="cmd-results" class="stack" role="listbox" aria-label="Commands and work search results"></div>
   <button id="cmd-load-more" hidden>More results</button>