No, it isn't supported in XF2 out of the box, but they are only hidden with CSS so it would take very little to actually show them. In XF2 you could just edit the
node_list.less
template and change this:
Less:
@media (max-width: @xf-responsiveNarrow)
{
.node-subNodeMenu
{
display: none;
}
}
To:
Less:
@media (max-width: @xf-responsiveNarrow)
{
.node-subNodeMenu
{
// display: none;
}
}
Or you could just remove that bit of code, or you could just override it in extra.less or similar.
I'm fairly sure it would be just as trivial in XF1 too.