This doesn't work, because gettext doesn't pick up the translations.
The context in the source string makes gettext think that it's a special
translation, while our workaround suggests that it has no context.

Transifex offers the option to add context manually.

Those changes aren't yet implemented, but will definitively be included.

Fixes #28.

Fixes #68.

The green now fully shines while I made the full black ring border a
dark grey.

To increase contrast, on suggestion by @grote.

As suggested by LocLab.

Still not working, but we surely need this...

Fixes #67.

On suggestions by yahoe.001 and anm on Transifex.

Credits of those texts go to:
* https://code.briarproject.org/briar/briar/-/blob/4e5f2e31df85cb6d56559bb99bc921d322f6a1af/TRANSLATION.md
* !65 (comment 41992)

Related to #65

Related to #66

Followup to !63

Closes https://code.briarproject.org/briar/briar-gtk/-/milestones/4

This reverts commit 9bfa6155.

Closes #54

Fixes #63.

The username and time in messages will be shown if either
* the author changes
* or the time difference of two messages is greater than 60 seconds

Closes #53.

Related to #53. This already improves UX a lot, but I still think we
should omit the username if it doesn't change between messages. Thinking
about it, we could even omit the time if it doesn't change.

The color used is Briar's primary "Lime" color, as per
* https://briar-styleguide.netlify.app/brand/
* https://code.briarproject.org/briar/briar-styleguide/-/blob/2e8fa50a2628ce685ad2a3c88337388b29f496ba/layouts/partials/brand/colors.html#L15

Fixes #62.