Pages you added are still recognized after you sign out, and other fixes
Signing out keeps track of the pages you've added, a page whose content you deleted can be added again, and View Asset opens your own dashboard.
- Signing out keeps track of the pages you've added, so after you sign in, a page you added before shows "Update Asset" instead of "Add to Screenly".
- A page whose content you deleted in the Screenly dashboard shows "Add to Screenly" in the pop-up, not "Update Asset".
- "View Asset", after you add a page, opens that content in your own Screenly dashboard.