Dropbox changes
Another text change ("go back" to "try again")
Merge pull request #548 from code-dot-org/sharing-modal-update

Another text change ("go back" to "try again")
Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging
add fa-AF locale and update hoc beyond tutorial strings
Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging
Merge pull request #549 from code-dot-org/staging

DTT