Thunderbird:Fix some longstanding bugs

The things that always bug me about TB are mostly bugs that have been around for a long time, back to early suite development, with little attention. In particular, I see a lot of mail composition bugs, especially around HTML and also format=flowed. Part of the problem, I assume, is that the editor code is all gnarly and nobody currently active on the project wants to get that deep into it.

These are some that I think really ought to be given attention:

Mail Editing bugs

Bug 180997: Embedded images (and other documents) in an HTML composition are simply discarded during the conversion to plain text; these should be turned into attachments. Even worse: embedding an image does not count as "HTML formatting" when determining whether to convert to plain text, so unless the user has performed one of the mystical ablutions to ensure the message going out as HTML, the image -- which may be the most important part of the message -- can be dropped without notice.

Bug 125928: HTML compose, converted to plain text for sending, is marked as format=flowed but is not processed like plain text is for f=f, resulting in badly formatted mail

Bug 155622 and Bug 220575: Plain Text compose: When you open a saved draft, or Edit <msg> As New (155622), or select Edit | Rewrap (220575), all the flow information is discarded, so the end of every visible line has a hard line break. Restoring all that information is tedious and error-prone.

Bug 187997: Rewrap doesn't work on selected (plain) text; it joins lines incorrectly and puts quote marks (>) in the middle of lines.

Bug 249082: Rewrap behavior in an HTML message is just wrong; it either does nothing to, or completely breaks, quoted text. (It has essentially no effect on the user text, which is as expected, and as it should work for plain text.)

[More to come...]

--mcow 06:54, 13 Mar 2005 (PST)