[Translators] Support for msgctxt

[Paul]

On Tue, 13 Nov 2012 10:57:41 +0100
Andrej Kacian <andrej at kacian.sk> wrote: 

> The files would contain:
> 
> #: src/account.c:1537
> msgctxt "Accounts List Get Column Name"
> msgid "G"
> msgstr ""
> 
> 
> Programatically, We'd just switch from Q_("context|string") to
> C_("context", "string"), so the potential impact would be bigger
> for translators than for developers.

It seems a good idea to me and adds clarity, which is particularly
useful for new translators.

with regards

Paul


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