Trigger new pipeline for patches that depend on a patch to be merged

[supertassu]

Steps to reproduce:

• Create MRs for a stack of two patches
• Amend the second patch, and push that
• While the CI for the now-updated second patch is running, merge the first patch
• Now the second patch gets stuck with a message saying "You should run a new pipeline, because the target branch has changed for this merge request."

Could Gerritlab automatically trigger the new pipeline for the second patch when merging the first patch?