[forms] don't display 'remove' link of inlined form for the first entity related using a '+' cardinality to its parent entity
Closes #5227394
#! /bin/sh -e#if [ "$1" = configure ]; then if which install-docs >/dev/null 2>&1; then install-docs -i /usr/share/doc-base/cubicweb-doc fifi#DEBHELPER#exit 0