fix(高级搜索): 缺陷管理按照严重程度搜索无效

--bug=1015254 --user=李玉号 【测试跟踪】缺陷管理-高级搜索，按照“严重程度”筛选无效
https://www.tapd.cn/55049933/s/1209297

frontend/src/business/components/common/components/search/MsTableAdvSearchBar.vue

@@ -109,12 +109,18 @@ export default {
       this.visible = false;
     },
     setCondition(condition, component) {
-      if (!component.custom) {
+      //【严重程度、处理人、状态】三个字段储存在自定义表但是其 custom 的值是 false
+      // 因为需求要把这些字段在有选项分类时归为 系统字段 ？
+      if (component.custom || (component.label === '严重程度' || component.label === '处理人' || component.label === '状态')) {
+        this.handleCustomField(condition, component);
+        return;
+      }
       condition[component.key] = {
         operator: component.operator.value,
         value: component.value
       };
-      } else {
+    },
+    handleCustomField(condition, component) {
       if (!condition.customs) {
         condition['customs'] = [];
       }
@@ -132,8 +138,6 @@ export default {
         value: value,
         type: component.type
       });
-      }
-
     },
     reset() {
       let source = this.condition.components;