Display "changes by" build reason text in Bamboo builds when triggered by Bitbucket

When a build is triggered by a Bitbucket push, the build plan reason text says "Manual build by <bitbucket user>" instead of what it usually does under Fisheye/Subversion, where it either reads "Changes by <committer>" or "Changes by X people".

It would be nice if the trigger from Bitbucket could be changed to something other than the "manual build" verbiage, as it is nice for us to be able to tell at a quick glance that a build was triggered by a source code commit. It is also somewhat confusing since the build wasn't really a manual run at all, it was triggered by Bitbucket.