When user has selected the list of all entries in all subscribed feeds, show the localized string for "all subscriptions" as list title.

When the user has selected a feed for reading, the title over the entries list is a link to the feed url. If he has selected a folder or the list of all unread entries, the list title is plain text (not-underlined, not-clickable).
Show feed title for each entry in the entries list.

When reading a list including entries from many feeds (whole folder, "all subscriptions" list), this helps the user to decide which entry to read next.
Added acceptance test to check that the feed title is shown besides each entry title.