Update legacy CBI markup to use actual table, tr, th and td elements instead of using div element corresponding table classes. Fixes compatibility with OpenWrt 2020 theme. Ref: https://github.com/openwrt/luci/issues/4972 Signed-off-by: Jo-Philipp Wich <jo@mein.io> (cherry picked from commit 2155868175fdf1de273cafc0b37b1b9fd5900b04)