the `view/research/l10n.json` configuration was missing from the transifex config, so translations are missing.

Add research view to transifex config

- `/preview/editor` will load GUI with an empty project
- `/preview/:id/editor` will load GUI with a project from the projects server (not local data)
- passes intl object to GUI
- `/preview/:id` with show the project page with an embedded player
- `/preview/:id/fullscreen` will load the project page with the player in fullscreen mode.

* Note that we needed to Increase memory for the build to avoid running out of heap space, and build time increases by about 2 minutes

- use more explicit route
- handle fastly error in the callback correctly
- more succinct parsing of the URL path

Correct preview route for fastly