refactor(BlockSelectionState): Refactored so selection of blocks in 2x2 grids is more intuitive and added left() and right() methods to aid this effort.

src/handlers/radarr_handlers/library/movie_details_handler.rs

@@ -447,7 +447,7 @@ impl<'a, 'b> KeyEventHandler<'a, 'b, ActiveRadarrBlock> for MovieDetailsHandler<
           );
           self.app.data.radarr_data.edit_movie_modal = Some((&self.app.data.radarr_data).into());
           self.app.data.radarr_data.selected_block =
-            BlockSelectionState::new(&EDIT_MOVIE_SELECTION_BLOCKS);
+            BlockSelectionState::new(EDIT_MOVIE_SELECTION_BLOCKS);
         }
         _ if key == DEFAULT_KEYBINDINGS.update.key => {
           self