Adanced relation handling for Issue Import
As in Ticket #25799 mentioned, there would be a little improvement for the ticket import via CSV useful: We want to use ticket imports for new projects, where we have our standard tickets. But we don´t need all of these tickets for every new project. When deleting some rows, the relational row-link to the parent ticket can change. So it would help to relate to a defined ID-Column or something, where the ID doesn´t change, even if rows are deleted inbetween.