[horde] [i18n] French translation update PR dependent on PR #24

[Jean Charles Delépine]

Hello,

I have a ready pull request to update the French translation for imp.
It is based on the following PR, which updates an English string:

🔗 https://github.com/horde/imp/pull/24
This PR replaces:
    "Save attachments in the sent-mail message?"
with
    "Include attachments in messages saved to Sent Mail?"

My translation PR includes this new string, so I’m waiting for PR #24  
to be merged before publishing or adjusting the translation accordingly.

     Jean Charles Delépine

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