codeeditor加个focus方法

src/base/single/editor/editor.code.js

@@ -142,6 +142,10 @@ BI.CodeEditor = BI.inherit(BI.Single, {
         this.editor.focus();
     },
     
+    blur: function () {
+        this.editor.getInputField().blur();
+    },
+
     setStyle: function (style) {
         this.style = style;
         this.element.css(style);