🐛(frontend) fix empty left panel after deleting root doc

When we were deleting a root document, the left panel
was getting empty. It was because the panel thought that
it was a child document and was trying clear
dynamically the panel.
Now, we are checking if the document is a root or not,
if it is a root we just redirect to the homepage.

CHANGELOG.md

@@ -23,6 +23,7 @@ and this project adheres to
 ### Fixed
 
 - 🐛(service-worker) Fix useOffline Maximum update depth exceeded #1196
+- 🐛(frontend) fix empty left panel after deleting root doc #1197
 - 🐛(helm) charts generate invalid YAML for collaboration API / WS #890
 - 🐛(frontend) 401 redirection overridden #1214