Add icon to login button

Author: Kristan Kenney

web/templates/login.html

@@ -82,7 +82,7 @@
                                         </tr>
                                         <tr>
                                             <td style="padding: 0 0 12px 0;">
-                                                <input tabindex="3" type="submit" value="<?php print __('Log in');?>" class="button">
+                                                    <button tabindex="3" type="submit" class="button"><?php print __('Log in');?>&nbsp;&nbsp;&nbsp;<i class="fas fa-sign-in-alt"></i></button>
                                             </td>
                                         </tr>
                                     </table>