Editor: app help not shown after updates

[kr1zz]

1. Open an app in the editor
2. update the help
3. open the help -> not changed!

Workaround: move to another view (es. search or marketplace) and go to the editor again. Open the app, open the help -> new!

Linked to:

• App parameters not shown correctly after update #216
• App list not updated after deploy #215