message: fix(plugins-flow-client): reset rootId when all nodes are deleted
diff: @@ -19,7 +19,7 @@ export function removeNode(
  flowGraph = { ...flowGraph, nodes: resultNodes };
  items = resultItems;
  if (nodeToRemove.parents.length <= 0 && nodeToRemove.children.length <= 0) {
  - return { flowGraph, items };
  + return { flowGraph: { ...flowGraph, rootId: null }, items };
  }
  const [parentId] = nodeToRemove.parents;
  