Apply CSS style to input elements

Different browsers have wildly different defaults for input elements.
Try to get a consistent interface by applying our own style.

vnc.html

@@ -121,7 +121,7 @@
                 </textarea>
                 <br />
                 <input id="noVNC_clipboard_clear_button" type="button"
-                    value="Clear" />
+                    value="Clear" class="noVNC_submit" />
             </div>
 
             <!-- Toggle fullscreen -->
@@ -165,7 +165,7 @@
                         </select></label>
                     </li>
                     <hr>
-                    <li><input type="button" id="noVNC_settings_apply" value="Apply" /></li>
+                    <li><input type="button" id="noVNC_settings_apply" value="Apply" class="noVNC_submit" /></li>
                 </ul>
             </div>
 
@@ -182,7 +182,7 @@
                     <li><label><strong>Port: </strong><input id="noVNC_setting_port" /></label></li>
                     <li><label><strong>Password: </strong><input id="noVNC_setting_password" type="password" /></label></li>
                     <li><label><strong>Token: </strong><input id="noVNC_setting_token" /></label></li>
-                    <li><input id="noVNC_connect_button" type="button" value="Connect" /></li>
+                    <li><input id="noVNC_connect_button" type="button" value="Connect" class="noVNC_submit" /></li>
                 </ul>
             </div>
         </div>