Reorder download data buttons to Data Archive, URL Archive, Metadata CSV

[juzen2003]

• Were any Django, import pipeline, table_schema, or dictionary files modified? N
  • Database used: opus3_test_200517
  • All Django tests pass: Y
• Were any JavaScript or CSS files modified? N
  • JSHINT run on all affected files: NA
  • Tested on Chrome, Firefox, Safari, and iOS: Y (Remember to test all browser sizes)
  • Tested for race conditions (with delayed API calls if applicable): NA

Description of changes: In download data pane, the button order from left to right is: Data Archive, URL Archive, Metadata CSV