Ahh, right, thankyou make, for reminding me that 'all' isn't actually
any automagically chosen target that is chosen when no target has been
specified. No, instead, the first target is chosen.
And not just any target! Only the first non-templated target is chosen,
so in this case: po/telegram-purple.metainfo.xml.pot .
However, in our case that's utterly pointless, so 'all' needs to
be on top again. I should have known there was an important reason.
I'm aware that the new PO files are fishy and throw a lot of warnings.
I've created a ticket with Transifex, as their new PO-generation routine
seems to be bug-ridden.
However, until they fix it, we have to use the ugly value for msgid "".
