[update 89966] 富文本组件：去掉不能用的功能、解决火狐浏览器格式刷异常、解决显示错位

public/ueditor/third-party/codemirror/codemirror.css

@@ -43,6 +43,7 @@
 }
 
 .CodeMirror-wrap pre {
+    overflow: hidden;
     word-wrap: break-word;
     white-space: pre-wrap;
 }