Fix selection logic in LibraryFolder component to handle empty states

                }

            });

            return this.selected.length + unselectable === this.$refs.folder_content_table.computedItems.length;

            const numComputedItems = this.$refs.folder_content_table.computedItems.length;

            if (numComputedItems === 0 || numComputedItems === unselectable) {

                return false;

            }

            return this.selected.length + unselectable === numComputedItems;

        },

        toggleSelect() {

            this.unselected = [];