**What** - allow unsetting shipping in RMA flows + bug cleanup around shipping flows in claims / exchanges - additional fixes: - product type create form - product type delete - delete confirmation messages - fix a few inventory strings + material field --- CLOSES CMRC-945 CLOSES CMRC-953 CLOSES CMRC-967 CLOSES CMRC-963 CLOSES CMRC-954 Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>