#5 message when suppressing child

[Nicolas Le Novère]

When we "suppress a child", we get a warning that we are about "to delete a term". This is not correct. What we are deleting is a relationship. And we cannot delete the last relationship. The child become obsolete. I suggest we change the message to "suppress a child".

[Nicolas Le Novère]

Also make the message more explicit. "you are about to suppress the child XXX". Because what happens sometimes is that we select the wrong one from the pull-down menu.