DMThreadsPage: Make progress entry unactivatable
SearchPage: Make list keyboard-scrollable

Works around https://bugzilla.gnome.org/show_bug.cgi?id=732345
ListStatusesPage: Make list keyboard scrollable

Works around https://bugzilla.gnome.org/show_bug.cgi?id=732345 and
fixes #182
list-statuses-page: Make the list name normal sized