fix(editor): revert task list dependence on ids

This partially reverts 3969f6ae66. Adding ids to task list items is not as simple and actually made it worse in some cases. Hence we stick to comparing the content of nodes for now, until this is properly fixed in tiptap.

Related https://kolaente.dev/vikunja/vikunja/issues/2091#issuecomment-60063

frontend/src/components/input/editor/TipTap.vue

@@ -389,20 +389,7 @@ const editor = useEditor({
 		CustomImage,
 
 		TaskList,
-		TaskItem.extend({
-			addAttributes() {
-				return {
-					...this.parent?.(),
-					id: {
-						default: () => createRandomID(),
-						parseHTML: element => element.getAttribute('data-id'),
-						renderHTML: attributes => ({
-							'data-id': attributes.id,
-						}),
-					},
-				}
-			},
-		}).configure({
+		TaskItem.configure({
 			nested: true,
 			onReadOnlyChecked: (node: Node, checked: boolean): boolean => {
 				if (!isEditEnabled) {
@@ -414,7 +401,7 @@ const editor = useEditor({
 				// https://github.com/ueberdosis/tiptap/issues/3676
 
 				editor.value!.state.doc.descendants((subnode, pos) => {
-					if (node.attrs.id === subnode.attrs.id) {
+					if (node.eq(subnode)) {
 						const {tr} = editor.value!.state
 						tr.setNodeMarkup(pos, undefined, {
 							...node.attrs,
@@ -422,10 +409,10 @@ const editor = useEditor({
 						})
 						editor.value!.view.dispatch(tr)
 						bubbleSave()
-						return true
 					}
 				})
 
+
 				return true
 			},
 		}),