[BUG] Use correct template for commitmail error

- Use the correct template that was given when there's an error in
retrieving which git identity should be used.
- Remove the error from the exception list.

routers/web/repo/editor.go

@@ -950,7 +950,7 @@ func getGitIdentity(ctx *context.Context, commitMailID int64, tpl base.TplName,
 
 		if email == nil || !email.IsActivated {
 			ctx.Data["Err_CommitMailID"] = true
-			ctx.RenderWithErr(ctx.Tr("repo.editor.invalid_commit_mail"), tplEditFile, form)
+			ctx.RenderWithErr(ctx.Tr("repo.editor.invalid_commit_mail"), tpl, form)
 			return nil
 		}