Users should not be able to prohibit their own login (#10970)

* ui: limit managers prohibit themself to login

Because I think it's crazy and not reasonale , that if a user can
prohibit themself to login. so suggest limit this choice on ui

Signed-off-by: a1012112796 <1012112796@qq.com>

* skip self Prohibit Login in post event handle

* fix comment

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

routers/admin/users.go

@@ -243,7 +243,13 @@ func EditUserPost(ctx *context.Context, form auth.AdminEditUserForm) {
 	u.AllowGitHook = form.AllowGitHook
 	u.AllowImportLocal = form.AllowImportLocal
 	u.AllowCreateOrganization = form.AllowCreateOrganization
-	u.ProhibitLogin = form.ProhibitLogin
+
+	// skip self Prohibit Login
+	if ctx.User.ID == u.ID {
+		u.ProhibitLogin = false
+	} else {
+		u.ProhibitLogin = form.ProhibitLogin
+	}
 
 	if err := models.UpdateUser(u); err != nil {
 		if models.IsErrEmailAlreadyUsed(err) {