1289493 - Save spell checking language with draft message and restore/remember it when editing the draft (port bug 1169184 to SeaMonkey)

Status: NEW

(SeaMonkey :: MailNews: Composition, defect)

Description

[rsx11m]

+++ This bug was initially created as a clone of Bug #1169184 +++

Core support for the Content-Language: header was added in that bug which can be used to keep track of the language in draft messages. Bug 1169184 implemented the application-specific changes in MsgComposeCommands.js for Thunderbird. The task for this bug is to port the respective changes to SeaMonkey, however, this is not a straight port due to differences in the implementation.

(Quoting Jorg K from bug 1169184 comment #30)
> This may be of interest to SM. As far as I know, you don't have a language
> indicator in the status bar, so the implementation would be different since
> there is MutationObserver:
> https://dxr.mozilla.org/comm-central/source/mail/components/compose/content/MsgComposeCommands.js#2257
> 
> I've just noticed that there hasn't been any action on bug 1279055 either.