Assign labels and milestones from a target project when moving an issue
When we move issue to another project, we can assign a milestone and labels that have same meaning/content in a target project, like in source project.
So if we have milestone '8.6' in a source project (that issue originates from) and similar '8.6' milestone in a target project, we should assign this milestone to a new issue that has been created during a move. Same with labels.
/cc @DouweM