chore： 优化一下

src/case/button/item.multiselect.js

@@ -38,6 +38,7 @@ BI.MultiSelectItem = BI.inherit(BI.BasicButton, {
                 type: "bi.center_adapt",
                 items: [this.checkbox]
             }, {
+                el: {
                     type: "bi.label",
                     ref: function (_ref) {
                         self.text = _ref;
@@ -54,6 +55,7 @@ BI.MultiSelectItem = BI.inherit(BI.BasicButton, {
                     keyword: o.keyword,
                     value: o.value,
                     py: o.py
+                }
             }]
         };
     },

src/case/button/node/node.arrow.js

@@ -32,6 +32,7 @@ BI.ArrowNode = BI.inherit(BI.NodeButton, {
             type: "bi.vertical_adapt",
             columnSize: [o.iconWrapperWidth || o.height, "fill"],
             items: [this.checkbox, {
+                el: {
                     type: "bi.label",
                     ref: function (_ref) {
                         self.text = _ref;
@@ -45,6 +46,7 @@ BI.ArrowNode = BI.inherit(BI.NodeButton, {
                     value: o.value,
                     py: o.py,
                     keyword: o.keyword
+                }
             }]
         };
     },

src/case/button/node/node.plus.js

@@ -37,6 +37,7 @@ BI.PlusGroupNode = BI.inherit(BI.NodeButton, {
             type: "bi.vertical_adapt",
             columnSize: [o.iconWrapperWidth || o.height, "fill"],
             items: [this.checkbox, {
+                el: {
                     type: "bi.label",
                     ref: function (_ref) {
                         self.text = _ref;
@@ -50,6 +51,7 @@ BI.PlusGroupNode = BI.inherit(BI.NodeButton, {
                     value: o.value,
                     keyword: o.keyword,
                     py: o.py
+                }
             }]
         };
     },