Be sure to set the Group: to the version number that the merge belongs to. Keep in mind, jEdit 5.1 is being stabilized at the moment and is the only version being maintained (in other words, don't bother submitting merges for older versions).
If merging bug fixes add the bug id prefixed with #. This will allow to search for merge requests for a given bug. There is no other way to find out the earliest version in which the bug is fixed.