Scottx611x/fix add file source translation

[scottx611x]

Fix #2887

[codecov]

Codecov Report

Merging #2890 into release-1.6.5 will decrease coverage by 0.32%.
The diff coverage is 98.36%.

@@                Coverage Diff                @@
##           release-1.6.5    #2890      +/-   ##
=================================================
- Coverage          59.48%   59.16%   -0.33%     
=================================================
  Files                434      434              
  Lines              27603    27189     -414     
  Branches            1274     1268       -6     
=================================================
- Hits               16421    16086     -335     
+ Misses             11182    11103      -79

Impacted Files	Coverage Δ
...e/js/data-set-import/controllers/file-upload-s3.js	70.37% <ø> (+1.13%)	⬆️
refinery/core/models.py	76.08% <100%> (-1.06%)	⬇️
refinery/data_set_manager/test_views.py	100% <100%> (ø)	⬆️
refinery/data_set_manager/views.py	58.94% <92.85%> (-0.13%)	⬇️

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