Followups for #919

[rdbende]

Now that the book overview page is ported to AdwActionRows, there are a couple of things needed to be done to finish up this new design:

• Rework the top part layout → the progress ring with the label's doesn't feel right
• Books with no cover image should have a symbolic icon, the same as in the library view
• The meatball menu is really empty, especially when the "Available Offline" item is hidden. Should have the same items, as in the library view
• Fix the tooltip label: #945