Fixing UI issues

Fixing UI issues from the add work page

https://trello.com/c/su2TXM5d/649-add-a-work-manually-lets-you-enter-a-translated-title-without-a-language-code
https://trello.com/c/ctn2hRsC/648-when-adding-a-work-manually-you-get-an-error-if-you-include-an-external-id
https://trello.com/c/Z4rJmmze/650-in-new-add-work-both-fields-for-external-id-say-identifier-value