We add some horizontal padding to the AllView's content to make
sure content does not end up underneath the scrollbar; while this
is not required in case of the FrequentView which does not have
a scrollbar, applying the same padding ensures that both views
end up with the same spacing, which makes switching between them
less disruptive.
https://bugzilla.gnome.org/show_bug.cgi?id=694261
62ca4ba624
