Hi folks: Upgraded to MacOS Mojave and now Thunderbird is freezing when saving attachments. Specifically, if I try to change the save directory or the filename of the attachment being saved (in the save window) Thunderbird freezes. I can sometimes save from the save window if I don't change the directory or filename. Normally I'd expect this is some of the new permissions/restrictions in Mojave on applications, except that the error is reliable only if I try to make changes in the dialog window, which suggests instead some form of bug or some config error due to the upgrade. Thanks!