如何从浮动工具条中去掉Close钮，大家知道，浮动中的工具条是带X(Close)按钮的，有时候我们不想显示它，怎样解决呢?-from the floating of the tools and remove the Close button, as you know, The floating tool belt is X (Close) button, and sometimes we do not want to show it, how to solve it