I added a msgctxt to all strings in the new devhub nav bar, but come to think of it, that's not necessary. The strings there can (and should) be reused as page titles etc, so removing the msgctxt makes sense.
Done, r50795. QA: This is transparent, i.e., the nav bar should still look the same before and after.
Verified FIXED on https://preview.addons.mozilla.org/en-US/developers.