editItem(target) {
		const listItem = target.parentElement.parentElement;

		listItem.classList.add('editing');

		const input = document.createElement('input');
		input.className = 'edit';

		input.value = target.innerText;
		listItem.appendChild(input);
		input.focus();
	}
Put an item into edit mode.

@param {!Element} target Target Item's label Element