From the bug report , which also has a screen shot mock up "This would make it easier to identify the folders of diffrent mail accounts. This would also make sense for the top account nodes."
Thanks for the idea. I've identified the related bug reports in bugzilla. And there is a related Firefox idea at https://connect.mozilla.org/t5/ideas/offline-grammar-and-spelling-checker/idi-p/43370
Thanks for posting this. Indeed, this reproduces for me and deserves a bug report.Can you file one at https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird ?
