Steps to reproduce:
1. Open eZ Studio (the Page tab),
2. Wait until the loading screen disappears,
3. Just after it disappears, click on Edit button in the top action bar.
It opens a landing page in PlatformUI editor.
The landing page should be opened in StudioUI editor.
Things to notice
It works correctly when the information panel in the top action bar is populated with data (page URL and modification info).
How can this be improved?
The loading screen should disappear when the information panel is updated with data, not before.