Is it possible to get the old behavior of Flex insets (before the fix for #8442)?

[Scott Kostyshak]

This came up here:
http://tex.stackexchange.com/questions/174447/lyx-how-to-hide-text-style-labels-by-default/174543#174543

I wrote that it's not possible in LyX 2.1, but since I know little
about layouts I wanted to check here. Is that right?

Scott