fix(模版管理): 修复模版编辑点击帮助时弹框的问题

--bug=1011893 --user=刘瑞斌 [项目设置] github#12235用例模板、缺陷模板页面，点帮助图标后 ，弹出的帮助文档未置顶，点击帮助之后，点返回才能看到文档 https://www.tapd.cn/55049933/s/1129701

Closes #12235

frontend/src/business/components/project/template/FieldTemplateEdit.vue

@@ -6,7 +6,7 @@
     :visible.sync="visible"
     :with-header="false"
     size="100%"
-    :modal-append-to-body="false"
+    :modal="false"
     ref="drawer"
     v-loading="result.loading">
     <template v-slot:default="scope">
@@ -239,4 +239,9 @@ export default {
 .filed-list {
   margin-top: 30px;
 }
+
+.field-template-edit {
+  z-index: 1500 !important;
+}
+
 </style>

frontend/src/business/components/project/template/IssuesTemplateList.vue

@@ -85,14 +85,12 @@ import MsTableOperators from "@/business/components/common/components/MsTableOpe
 import MsTableColumn from "@/business/components/common/components/table/MsTableColumn";
 import MsTable from "@/business/components/common/components/table/MsTable";
 import TestCaseReportTemplate from "@/business/components/project/template/TestCaseReportTemplate";
-import TestCaseTemplateEdit from "@/business/components/project/template/TestCaseTemplateEdit";
 import IssueTemplateEdit from "@/business/components/project/template/IssueTemplateEdit";
 
 export default {
   name: "IssuesTemplateList",
   components: {
     IssueTemplateEdit,
-    TestCaseTemplateEdit,
     TestCaseReportTemplate,
     MsTableHeader,
     MsTablePagination, MsTableButton, MsTableOperators, MsTableColumn, MsTable