Dropbox: New users cannot connect

[gerhardol]

Dropbox has declined the production key license and new users will not be able to connect to the service. See the response below. A rewrite is required to solve this. (A temporary solution is to create a new key, but that will require users to sign in again, still limiting number of users).

Until this is rewritten, the Dropbox provider will be disabled for new users.

Your production key request was declined for the following reason:Your  app currently processes the OAuth app authorization flow inside a web  view, instead of the system browser. The OAuth app authorization flow  should be processed in the user's system browser. See here for more  information: https://www.dropbox.com/developers/documentation/http/documentation#oauth2-authorize .