* Add external component e2e
* Emit appear and disappear events for external components

I found the names used for the animation classes to be a bit undescriptive,
even though this might break a few users I think it’s for the best as a few
contributors were confused by these names as well.

This commit also allows TouchablePreview component to accept any touchable components,
not only the ones included in RN.

Complex layouts were added to relevant parts in the playground app.

Add direction property to OptionsLayout interface

* Fix iOS pop gesture when nav bar is hidden

* Add missing property

* Factor out InteractivePopGestureDelegate into its own file

* Add missing import

* Make sure fix supports hidden and visible nav bars

* Minor code style fix

Previous push animation wasn’t cancelled, when it ended the controller tried
to destroy previous view which was already destroyed.

When popToRoot or popTo where called while a screen was pushed, at the end of the push animation RNN tried to destroy an already destroyed ViewController.
Related to #3767

Mostly removed unused files left over from the recent playground app refactor

Fix typos in styling.md

Fix android title glitch and title center alignment issue on layout orientation change

Add curly braces around the visible property

uilib is used only in the playground app and was added by mistake to dependencies.

React button components now support overflow: visible. This property is especially useful when displaying buttons with a badge
which exceeds the button bounds.

* Add -UseModernBuildSystem=NO for xcodebuild

* Add -UseModernBuildSystem to detox build

If you use overlays to show in-app notifications
it would closes the keyboard every time an overlay is
opened.

Fix top bar buttons size on iOS 10

Fixes #4759

* Cleanup and reorganise playground app

* Separated tests into three categories
  1. Layouts - layout specific tests and feature showcase
  2. Options - options related tests; interactions between static and dynamic options, merge options etc
  3. Navigation - general navigation features; Orientation handling, events, Overlay etc

* Fixed a few Android bugs
  1. testID wasn’t applied on TopBar react buttons
  2. static options were disregarded when creating initial BottomTab options
  3. Trying to open a none existent SideMenu would result in a crash

* Fix e2e tests

* Fix lint

* Few fixes + split push from SideMenu test into two tests

* Fixes e2e

On Android options were not updated when SideMenu was opened or closed
via swipe gesture. This caused bugs when trying to interact with the drawer again via gestures since
the drawer would immediately close or open according to the visibility in options.

When loading local image resource (images in Drawable folder), RNN mistakingly tried to load the image as a js asset even if it successfully loaded the local image.

Replace with 'Starter kits'

* Support rtl layout

* ios layout options

* Support rtl layout

* Use View.LAYOUT_DIRECTION_LTR constant instead of 0

* move layout direction logic to RootPresenter

* Fix tests

* Fix tests

* Fix tests

* Fix tests

* fix tests

* Fix tests

This fixes an issue where the frame for the custom view can be set to the incorrect y-offset upon setting the custom frame.

In iOS 11, this behavior changed, as UIBarButtonItem went from being using springs-and-struts for sizing, to using a UIStackView, and thus using Autolayout.

This lead to the superview of having a frame of (0, 22, 0, 0) at the first layout pass.

By moving to using NSLayoutConstaints, we can now properly size our custom view.

See also: https://gist.github.com/niw/569b49648f
See also: https://stackoverflow.com/questions/10988918/change-width-of-a-uibarbuttonitem-in-a-uinavigationbar

Using lodash.set caused issues when keys contained the dot symbol. _.set created objects inside the store, which is intended to be a simple key value dictionary -
In some cases, set would overwrite previously set values.

Doing `git clone -b v2 git@github.com:wix/react-native-navigation.git` gives me this:
```
fatal: Could not read from remote repository.
Please make sure you have the correct access rights and the repository exists.
```

Removed unused class which isn't compatible with RN 0.58

Fixes #4646

* Added missing mergeOptions for text, icon, selectedIcon, textColor, selectedTextColor, iconColor, selectedIconColor, badgeColor

* Minor changes