Do not hide scroll buttons if some tabs are still hidden.
Adds auto overflow to content div.
Adds an admin layout that displays the admin menu in the sidebar.
Adds a Plugin API to allow one plugin to depend on another.
Adds buttons to scroll the tabs when they overflow.
One missing string (#4380)
Translation updates * lt (#4384) * pt-BR (#4380) * ru * zh-TW (#4352)
Moved charset meta tag before title (#4320).
Make sure user can not watch what he is not allowed to view.
Make sure users don't get notified for thing they can not view (#3589).
