Multi-view bookmarks

[bcomnes]

One possible solution to the the multi-title problem would be to build a more comprehensive multi-type bookmark view.

Essentially, on a bookmark details page, you would also show episode entities (and maybe what feed its apart of) and one of the archive snapshots.

Archive snapshots would support selecting other snapshots by date or dropdown and also perhaps a diff mode, where you can view diffs between two snapshots.

Additionally, failed episodes and archive details should be accessible here.

This would also allow for the removal of the archives button in the header, which just ate up all the real estate up there.

[bcomnes]

Ensure that failed work is displayed in the multibookmark view.