Fix idle.js not change isAway property on onAway and onAwayBack events

public/js/index.js

@@ -685,8 +685,18 @@ var spinner = new Spinner(opts).spin(ui.spinner[0]);
 
 //idle
 var idle = new Idle({
-    onAway: idleStateChange,
-    onAwayBack: idleStateChange,
+    onAway: function () {
+        idle.isAway = true;
+        emitUserStatus();
+        updateOnlineStatus();
+    },
+    onAwayBack: function () {
+        idle.isAway = false;
+        emitUserStatus();
+        updateOnlineStatus();
+        setHaveUnreadChanges(false);
+        updateTitleReminder();
+    },
     awayTimeout: idleTime
 });
 ui.area.codemirror.on('touchstart', function () {
@@ -713,14 +723,6 @@ function updateTitleReminder() {
     }
 }
 
-function idleStateChange() {
-    emitUserStatus();
-    updateOnlineStatus();
-    if (!idle.isAway)
-        setHaveUnreadChanges(false);
-    updateTitleReminder();
-}
-
 function setRefreshModal(status) {
     $('#refreshModal').modal('show');
     $('#refreshModal').find('.modal-body > div').hide();