Changes

'''[https://wiki.mozilla.org/Talk:Thunderbird:Archived_Home_PageHome#Major_Usability_Redesign_of_Folders_.26_Threads_.28in_4_Steps.29 this groundbreaking contribution] by Thomas LandaueLandauer'''r is still valid (and probably will be, even for Thunderbird v4), I'd like to point everybody's - especially the developers' - attention to it.