Revert "设置列表是否单选默认值"

This reverts commit bf025d60.

@CONTROL/列表/CONTROL-BASE.vue.ftl

@@ -218,7 +218,7 @@ import CodeListService from "@/codelist/codelist-service";
      * @type {boolean}
      * @memberof ${srfclassname('${ctrl.codeName}')}Base
      */
-    @Prop({default:true}) public isSingleSelect!: boolean;
+    @Prop() public isSingleSelect!: boolean;
 
 <#if view.getPSAppViewLogics?? && view.getPSAppViewLogics()??>
   <#list view.getPSAppViewLogics() as logic>