- Don't call keep-alive on print page

program/js/app.js

@@ -5078,9 +5078,9 @@ function rcube_webmail()
     if (this._int)
       clearInterval(this._int);
 
-    if (this.env.keep_alive && !this.env.framed && this.task=='mail' && this.gui_objects.mailboxlist)
+    if (this.env.keep_alive && !this.env.framed && this.task == 'mail' && this.gui_objects.mailboxlist)
       this._int = setInterval(function(){ ref.check_for_recent(false); }, this.env.keep_alive * 1000);
-    else if (this.env.keep_alive && !this.env.framed && this.task!='login')
+    else if (this.env.keep_alive && !this.env.framed && this.task != 'login' && this.env.action != 'print')
       this._int = setInterval(function(){ ref.send_keep_alive(); }, this.env.keep_alive * 1000);
   };