feat: implement modals with vue router 4

This is an implementation of the modals with the new possibilities of vue router 3.

See: https://github.com/vuejs/vue-router/issues/703#issuecomment-865066913 for a better explanation
and the linked example implementation: https://github.com/vuejs/vue-router-next/blob/master/e2e/modal/index.ts

src/components/tasks/partials/kanban-card.vue

@@ -7,8 +7,8 @@
 			'has-light-text': !colorIsDark(task.hexColor) && task.hexColor !== `#${task.defaultColor}` && task.hexColor !== task.defaultColor,
 		}"
 		:style="{'background-color': task.hexColor !== '#' && task.hexColor !== `#${task.defaultColor}` ? task.hexColor : false}"
-		@click.ctrl="() => toggleTaskDone(task)"
 		@click.exact="() => $router.push({ name: 'task.kanban.detail', params: { id: task.id } })"
+		@click.ctrl="() => toggleTaskDone(task)"
 		@click.meta="() => toggleTaskDone(task)"
 	>
 		<span class="task-id">
@@ -112,6 +112,13 @@ export default {
 				this.loadingInternal = false
 			}
 		},
+		openTaskDetail() {
+			this.$router.push({
+				name: 'task.detail',
+				params: { id: this.task.id },
+				state: { backgroundView: this.$router.currentRoute.value.fullPath },
+			})
+		},
 	},
 }
 </script>