Go from a Glitch app (projectname.glitch.me) to a project page on Glitch (glitch.com/~projectname)
Go from a Glitch app (https://projectname.glitch.me) to a project page on Glitch (glitch.com/~projectname), or from an editor page to the project page.
Right click on an editor, project, or app page to go to access a menu with buttons to let you go to one of the other pages.
Not an official Glitch app.
See the source on Glitch at https://glitch.com/edit/#!/app-to-project-extension.