修改pingThread内nam不设置父类自动管理析构，防止出现子类和父类不在同一线程的问题，修改版本列表始终显示滚动条，使得不用管理宽度。，给RleaseFrame非选中状态增加1px透明的边框，使得选中后的大小不再发生变化 #59

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