The latest version of SFW will now push local content from the browser to the origin server.
The flag button (called fork, perhaps a misnomer) moves a page to the origin server, if you're logged in there, or to local storage if you're not logged in.
Think of this as planting a flag on property, making it yours, for a version of yours that you have demonstrated at the moment.
Say, you edit a few pages with the results in local storage because you forgot to login. Follow this process to make your local changes public:
1. Login
2. Review Local Editing for each local page.
3. Press fork for pages you want to publish.
Notes
This required a small modification to both the sinatra and express servers. github 
Fork from history is a related function not fully addressed by this feature.