Display the title of the zim file for video
Resolve bug of search engine

This bug induced many clicks in small time when you typing "Enter" to
search anything in the search engine.
Resolve bug of wikipedia articles

During the 5 last commits, a bug was introduced.This bug made all
articles of wikipedia was redirect to the an  article named "Wikipedia".
Display message if no result in search engine
This resolves a bug to wikipedia articles

This bug was introduced  during the 3 last commits
Tell to the user the app is offline

This feature does not allow the user to type anything in the search
engine if the application is offline.
Resolve a small bug in historic

Historic was not displayed after the 10 last commits.