optimize for ending

Author: RoderickQiu

timer.html

@@ -1140,6 +1140,7 @@ <h3>
                 $("#stop-count").css("display", "none");
                 $("#only-one").css("display", "none");
                 $("#fullscreen-experience-tip").css("display", "none");
+                $("#time-adjust-dropdown").css("display", "none");
                 $("#work-rest").text("");
                 $nowTiming.text(i18n.__('ended'));
                 isClockWorking = 0;