Add "save/unsave album" to context menu

Fixes #964

README.md

@@ -217,8 +217,8 @@ playback depending on your desktop environment settings. Have a look at the
 | <kbd>Space</kbd>              | Queue track or playlist.                                       |
 | <kbd>.</kbd>                  | Play the selected item after the currently playing track.      |
 | <kbd>P</kbd>                  | Move to the currently playing track in the queue.              |
-| <kbd>S</kbd>                  | Save the currently playing track to your library.              |
-| <kbd>D</kbd>                  | Remove the currently playing track from your library.          |
+| <kbd>S</kbd>                  | Save the currently playing item to your library.               |
+| <kbd>D</kbd>                  | Remove the currently playing item from your library.           |
 | <kbd>Shift</kbd>+<kbd>P</kbd> | Toggle playback (i.e. Play/Pause).                             |
 | <kbd>Shift</kbd>+<kbd>S</kbd> | Stop playback.                                                 |
 | <kbd>Shift</kbd>+<kbd>U</kbd> | Update the library cache (tracks, artists, albums, playlists). |

src/ui/contextmenu.rs

@@ -276,6 +276,18 @@ impl ContextMenu {
             );
         }
 
+        if let Some(album) = item.album(queue.clone()) {
+            if let Some(savestatus) = album.is_saved(library.clone()) {
+                content.add_item(
+                    match savestatus {
+                        true => "Unsave album",
+                        false => "Save album",
+                    },
+                    ContextMenuAction::ToggleSavedStatus(album.as_listitem()),
+                );
+            }
+        }
+
         // open detail view of artist/album
         {
             let library = library.clone();