When no section title is defined, the table renderer is supposed to use
the uci section id as fallback when the table section is not declared
to be anonymous.
Fixes: #3147
Fixes: a90bf384b ("luci-base: form.js: harmonize title property handling")
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
e7ca163d7c