BI-118146 fix: 修复single_select_insert_list初始化发keyword为undefined的搜索请求问题

src/widget/singleselect/singleselectlist.insert.js

@@ -55,8 +55,10 @@ BI.SingleSelectInsertList = BI.inherit(BI.Single, {
             },
             itemsCreator: function (op, callback) {
                 op.keywords = [self.trigger.getKeyword()];
+                if (BI.isNotEmptyString(op.keywords[0])) {
                     this.setKeyword(op.keywords[0]);
                     o.itemsCreator(op, callback);
+                }
             },
         });
         this.searcherPane.setVisible(false);