fix(系统设置): 自定义字段，系统字段可以编辑选项

--bug=1010054 --user=lyh 【系统设置】模板管理-自定义字段，系统字段可以编辑选项
https://www.tapd.cn/55049933/s/1099946

frontend/src/business/components/settings/workspace/template/CustomFieldEdit.vue

@@ -3,7 +3,7 @@
     width="30%"
     :visible.sync="visible"
     @confirm="save"
-    :title="$t('custom_field.create')"
+    :title="title"
     append-to-body
     ref="msEditDialog">
 
@@ -45,7 +45,7 @@
         prop="options" :label-width="labelWidth">
         <ms-single-handle-drag
             :is-kv="form.scene === 'ISSUE'"
-            :disable="form.name === '用例等级'"
+            :disable="form.name === '用例等级' || isSystem"
             :data="form.options"/>
       </el-form-item>
 
@@ -91,7 +91,8 @@ export default {
         type: [{required: true,  trigger: 'change'}],
       },
       visible: false,
-      url: ''
+      url: '',
+      title: this.$t('custom_field.create')
     };
   },
   computed: {
@@ -123,8 +124,9 @@ export default {
     }
   },
   methods: {
-    open(data) {
+    open(data, title) {
       this.visible = true;
+      this.title = title;
       if (data) {
         Object.assign(this.form, data);
         if (!(data.options instanceof Array)) {

frontend/src/business/components/settings/workspace/template/CustomFieldList.vue

@@ -203,10 +203,10 @@ export default {
       });
     },
     handleEdit(data) {
-      this.$refs.customFieldEdit.open(data);
+      this.$refs.customFieldEdit.open(data, this.$t('custom_field.update'));
     },
     handleCreate() {
-      this.$refs.customFieldEdit.open();
+      this.$refs.customFieldEdit.open(null, this.$t('custom_field.create'));
     },
     handleCopy(data) {
       let copyData = {};

frontend/src/i18n/en-US.js

@@ -502,6 +502,7 @@ export default {
     issue_status: 'Status',
     issue_severity: 'Severity',
     create: 'Create Field',
+    update: 'Update Field',
     name: 'Custom Field',
     system_field: 'System Field',
     scene: 'Use Scene',

frontend/src/i18n/zh-CN.js

@@ -504,6 +504,7 @@ export default {
     issue_status: '状态',
     issue_severity: '严重程度',
     create: '创建字段',
+    update: '更新字段',
     name: '自定义字段',
     system_field: '系统字段',
     scene: '使用场景',

frontend/src/i18n/zh-TW.js

@@ -504,6 +504,7 @@ export default {
     issue_status: '狀態',
     issue_severity: '嚴重程度',
     create: '創建字段',
+    update: '更新字段',
     name: '自定義字段',
     system_field: '系統字段',
     scene: '使用場景',