The subscription for EventStack should be refactored in the Popup and MenuItem components

[mnajdova]

Bug Report

@kuzhelov: The implementation used in the Popup and the MenuItem for subscribing to EventStack has one subtle problem: although it solves the issue of item being opened and closed within the same frame, it also opens possibility for the following behavior:

MenuItem has opened submenu, this opened prop value doesn't change anyhow for the next JS frame.
///------ JS FRAME --------////

render method was called (but submenuOpen wasn't changed changed anyhow, it is still true)

updateOutsideClickSubscription

this.outsideClickSubscription.unsubscribe(), no subscription on outside click (!!)
setTimeout(() => subscription will be made on the next frame)
... some other logic ..

note, there is no click subscription at this moment, but it should be (!!)
////---------------------------////

Would suggest to leave a fix for a separate PR, for both components.

Reference: #539 (comment)