Issue board: Counter styling in header misses border in read-only view

Summary

Small finding. With 8.13, the new issue board list header displays delete list action, issue count and add issue action. In case of read-only access, only the issue count is displayed. Currently, it lacks a specific styling, the issue count misses its right border.

Tested on macOS (Safari and Chrome) and iOS (Safari and Chrome).

Steps to reproduce

Open an issue board with existing issues with read-only permissions.

Expected behavior

Issue count span in issue board list shows full borders in case of read-only access.

Actual behavior

Issue count span in issue board list does not show right border (since full permissions shows button group).

.board-issue-count.has-btn {
	1px 0 1px 1px;
}

Relevant screenshots

Find attached two screens.

gitlab-issue-column-desktop

Thanks for looking into this.