List of automatically imported translations?

Hi,

I noticed there is a warning for Firefox(eo) in the Pontoon translations:

https://pontoon.mozilla.org/eo/firefox/all-resources/?status=warnings&string=200202

The warning is correct, but nobody entered that translation for that 
text, it was "imported 4 days ago". Without the warning it would have 
been accepted, as it apparently was in es-MX:

https://pontoon.mozilla.org/es-MX/firefox/all-resources/?string=200202

There might be other translations that go unnoticed because automatic 
checks (and not a human translator) allowed them through. Even 100% in 
MT might not be good enough, depending on the context, so I think it 
would be a good idea to have automatic translations queue up as 
unreviewed (like those of any other contributor) instead of going 
straight to the approved state.

For those that might have slipped through in the past, is there a way to 
check all the "imported" translations? Something like a "System" author 
filter when searching by author?

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