取消注释以及完善多选框处理逻辑

src/views/perfManage/customTarget/index.vue

@@ -295,6 +295,7 @@ function fnSelectPerformanceInit(value: any) {
     i => i.neType === value
   );
   if (modalState.from.objectType) modalState.from.objectType = '';
+  if(modalState.selectedPre.length > 0) modalState.selectedPre = [];
 
   modalState.from.expression = '';
   const arrSet = new Set<string>();