Bugs +editstatus page forces removal of closed milestone

[dobey]

If there are many bug tasks on a bug, Launchpad forces you to go to the +editstatus page, breaking the ajax editing of bug task fields. However, when using the +editstatus page, to change the status of a task from "Fix Committed" to "Fix Released" for a milestone that has been released, the bug task's targeting to that milestone is force-removed, by Launchpad complaining about an error when the value is left in the drop-down. Only by setting the bug to an active milestone, or no milestone, can one continue. This causes the bug to no longer show up on the milestone's page, and disassociates the bug from that milestone completely.