Delete old classes related to Modal's old implementation which was based on Dialogs

[Breaking[ Modal refactor

* [Breaking] Showing modal removes the previously visible ViewController from hierarchy
* Modal implementation does not rely on Dialog
* Modal view is added to `content` layout
* Overlay is added to `root` layout, on top of the application's content
* Introduce StackControllerBuilder
* Show modal with animation
* Dismiss modal with animation
* Add previous modal at index 0
* Add root at index 0
* dismissAllModals dismisses only top modal with animation

This reverts commit a9b9d8379c.

Test Jenkins

Motivation:
When searching for the button's concrete TextView by label, if the
title has the same text as the buttons, both views are returned.

* Migrate to react v16.3 lifecycle & Add backward compatibility for older React versions

* remove yarn.lock

* migrate js and java to mergeOptions

* migrate ios to mergeOptions

This was occuring if a title has no properties set initially, but then are configured later. The title image data would go from [NSNull null] to nil, breaking this check.

By comparing against both values, we can ensure the correct logic for all behaviors.

* Rename to onChildWillAppear

* update roadmap

on clicking the outside of the sideMenu area sideMenu not closing,
because there is a problem in the code which i modified now