wip(frontend): user-friendly interface for users page

issue #1149

templates/main/admin_users.html.ep

@@ -11,17 +11,18 @@
                     <h2 class="display-5"><%=l 'Users' %></h2>
                     <div class="card-title">
                         <form method="post" action="/admin/users">
-                            <input type="text" name="name" placeholder="<%=l 'Users' %>">
+                            <input type="text" name="name" placeholder="<%=l 'Type a username here' %>">
                             <input type="submit" value="<%=l 'Search' %>">
-                            <button type="button" style="float: right; margin: 0 10px;" class="btn btn-success" onclick = "location='/users/register'"><%=l 'Register' %></button>
+                            <button type="button" style="float: right; margin: 0 10px;" class="btn btn-success" onclick = "location='/users/register'"><%=l 'New user' %></button>
                         </form>
                     </div>
                 </div>
+    %if(@$list_users){            
             <div class="card-body">
                         <table class="table table-striped">
                             <thead>
                                 <tr>
-                                <th><%=l 'Name' %></th>
+                                <th><%=l 'Username' %></th>
                                 </tr>
                             </thead>
                             <tbody>
@@ -33,6 +34,7 @@
                             </tbody>
                         </table>
                     </div>
+    %}
                  </div>
                 </div>
         </div>