优化选择数据逻辑，仅保留具有子项的行以便于删除操作

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昨天 fa4a8a332b2b60b7b94b1f763091c1daf8927710

 src/views/basicData/supplierManage/filesDia.vue

@@ -30,6 +30,10 @@
          :isSelection="true"
          @selection-change="handleSelectionChange"
          height="500"
          @pagination-change="paginationSearch"
          :total="total"
          :page="page.current"
          :limit="page.size"
      >
      </PIMTable>
         <pagination