update ui

- display full date when hovering over the age in the article list
- hide close article button on desktop layouts
- autofocus username on the login page
- hide the title on the settings/appearance dropdowns (still visible on the buttons)

src/assets/login.html

@@ -30,7 +30,7 @@
         <div class="form-group">
             <label for="username">Username</label>
             <input name="username" class="form-control" id="username" autocomplete="off"
-                   value="{% if .username %}{% .username %}{% end %}" required>
+                   value="{% if .username %}{% .username %}{% end %}" required autofocus>
         </div>
         <div class="form-group">
             <label for="password">Password</label>