core: domain_join: allow auto group assignment

packages/ui-default/locales/ko.yaml

@@ -312,6 +312,7 @@ Formula blocks: 공식 블록
 fs_upload: 업로드
 Gender Visibility: 성별 공개
 Gender: 성
+Group Assignment (Optional): 그룹 할당 (선택)
 Hard Deadline: 마감일
 Hash: 해시
 Have ALL PERMISSIONS in this domain: 이 그룹에 대한 모든 권한
@@ -387,6 +388,7 @@ Last Update At: '마지막 활동'
 LaTeX Expressions: LaTeX 표현
 Learn More: 더 알아보기
 Leave blank to use numeric pid.: 공란으로 둘 시 자동 배정
+Leave: 나가기
 Limitations: 제한
 Links: 링크
 List View: 목록 보기
@@ -680,7 +682,7 @@ Terms of Service: 이용 약관
 Test data comes from: Testdata 출처
 Testdata Config: Testdata 설정
 Text: 본문
-Leave: 나가기
+The group to join when user joining the domain.: 사용자가 그룹에 참여할 때 자동으로 참여할 그룹
 The homework's deadline is due but in extension. You can still submit for this problem but your score will be penalized.: 추가 접수 중입니다. 제출할 수 있지만 감점될 수 있습니다.
 The invitation code to enter to successfully join the domain. You can only use letters and numbers in the code and it should not be longer than 64 characters.: 초대 코드는 64글자 미만입니다.
 The invitation code you provided is invalid.: 잘못된 초대 코드

packages/ui-default/locales/zh.yaml

@@ -411,6 +411,7 @@ Generate Testdata: 生成测试数据
 Generate: 生成
 Gravatar URL Prefix: Gravatar地址前缀
 Group / UID: 小组或 UID
+Group Assignment (Optional): 小组分配 (可选)
 Group Name: 名称
 Hard Deadline: 最终截止时间
 Hash: 散列
@@ -908,6 +909,7 @@ Text: 文本
 The 'default' role applies to ALL REGISTERED USER.: default 角色作用于<b>所有已注册用户</b>
 The contest is a flexible time contest. You need to complete the contest within a specified time after you attended.: 本场比赛采用灵活时间模式，你需要在参加后的指定时间内完成比赛。
 The domain owner: 域所有者：
+The group to join when user joining the domain.: 加入域时自动加入的小组。
 The homework's deadline is due but in extension. You can still submit for this problem but your score will be penalized.: 作业已超过截止时间，但仍在延期时间内。您递交题目将无法获得全部分数。
 The invitation code to enter to successfully join the domain. You can only use letters and numbers in the code and it should not be longer than 64 characters.: 加入此域的邀请码。您只能使用字母和数字，并且不能长于 64 个字符。
 The invitation code you provided is invalid.: 您提供的邀请码无效。

packages/ui-default/locales/zh_TW.yaml

@@ -193,6 +193,7 @@ Forgot password or username?: 忘記密碼或者使用者名？
 Formula blocks: 公式區塊
 Gender Visibility: 性別可見性
 Gender: 性別
+Group Assignment (Optional): 小組分配 (選填)
 Hard Deadline: 最終截止時間
 Have ALL PERMISSIONS in this domain: 在此域中擁有全部許可權
 Help: 幫助
@@ -462,6 +463,7 @@ Support: 支援
 Technical Information: 技術資訊
 Temporary session: 臨時會話
 Text: 文字
+The group to join when user joining the domain.: 加入域時自動加入的小組。
 The homework's deadline is due but in extension. You can still submit for this problem but your score will be penalized.: 功課已經截止，但處於延期時間内。您此時遞交的題目無法獲得全部分數。
 Their account will not be deleted and they will be with the guest role until they re-join the domain.: 他們的賬號不會被刪除，並且之後將以 guest 角色訪問，直到他們重新加入域。
 There are no contests...: 沒有比賽…