Add isVisibleNode

[Andreslav]

No description provided.

[alexandrtovmach]

I'd like to avoid using while loop, because it's not very good way to implement anything like this. If something goes wrong we'll have infinite loop, and it's not good =)
I've also implemented this function, but haven't chance to push it here:

export const isVisibleNode = (node: any): boolean => {
  if (node.visible && node.parent) {
    return isVisibleNode(node.parent);
  } else {
    return node.visible;
  }
};

[sicking]

Nit: you should probably make this function return false if node.parent returns null. That indicates that someone is getting the visibility on a imported component or on a component that has been deleted by that still has instances. In both cases the node is not visible on any page.

[Andreslav]

@alexandrtovmach, @sicking Thank you, corrected, taking into account the wishes.