Add an icon in the bottom bar, to go to the top of the article
It needs to modify the way title names are displayed in the URL : replace anchors by ?title=
Fixes #36
Add a "Home" in the bottom bar, to start a new search
Fix the "top" button in the bottom bar : on a device, it did not work because it was too close to the scrollbar and triggered a "page down"
Fixes #36