It happens from time to time that you think you are working on some branch when actually you are on another.

What I usually do in such a scenario is:
1. check in on wrong branch.
2. switch to correct branch.
3. cherry pick from wrong to correct branch.
4. copy the merged file(s)
5. delete new change set created on correct branch created by cherrypick.
6. copy the files back to the workspace (or just paste from clipboard if it was a single file).
7. check in the changes (now properly set in the correct branch).
8. delete the unwanted changeset that was created on the wrong branch.

If I could do the chery pick without leaving a link or if I could delete the link after performing the cherry-pick I could then just delete the miss-placed changeset and that's it.
Currently this is not possible because the existence of this link prevents me from deleting the changeset that was miss-placed in the wrong branch.