fixes #1502

This reverts commit 6f7f9d1986.

This reverts commit 918d7859c1.

* fix images name

* upgrade example project to rn51 - ios

* Currently doesn't work - need to implement custom TopTab view

* Implement selected and unselected toTab color

* Test options are applied when layout is visible

* Load typface when parsing options

* fix test

* set current tab by container id

* currentTabByContainerID e2e

* lint fix

* e2e test

* largeTitleFix

* update to rn 49 - reload still not working on ios

* bridge fix

* small fixes

* testing with rn50

* removed package-lock

* go back to 49, problem with android in 50

* Implement titleFontFamily in topTab option

* docs

* Pass TypefaceLoader instead of context

When disabling elevation by setting topBarElevationShadowEnabled to false, this commit allows to re-enable it by setting the same property to true.
Elevation was previously disabled by using setOutlineProvider(null), with ViewOutlineProvider being an Android 5.0+ object responsible for determining how views draw their outline. To allow re-enabling elevation, we keep our original ViewOutlineProvider and restore it when elevation is enabled again.

* Document how to use index.js as entry point (ios)

* android too

* android too (fixed)

* added missing options

* generated docs

* generated docs

* async commands for all events

* test fix

* tabBarItem support

* apply tab items on tabController initialization

* e2e test

* refactored bottomTab item

* tests fix

* tabItem testID fix

* renamed tabBadge to badge

* fix merge

* BottomTab fix

* removed BottomTabs

* Revert "Improve getCurrentlyVisibleScreenId on iOS with drawers. (#2052)"

This reverts commit 2c30a52bb9.

* Revert "introducing navbar shadow on iOS (#2339)"

This reverts commit 8fd496e0c9.

* Revert "This fixes an issue with a custom title-view (which has a title and a subtitle) appearing at the left side of the nav-bar instead of the center during a transition animation: when a screen with this title-view is being pushed or when you pop back to it. (#2384)"

This reverts commit 3f7f6c2612.

* Revert "Now allowing the custom nav bar to take up the whole space on iOS (#2306)"

This reverts commit 74a02ccfc5.

* adds shadow opacity, shadow color, shadow offset, shadow radius to navbar for ios

* mentions ios shadow in styling-the-navigator docs

* Rename TabBar options to BottomTabs

* Restructure docs

* upstream merge

* Fixed bad merge

* More bad merges

* Mostly done, however a few properties missing and tests remain.

* async icons loading

* Left button

* Whoops!

* Added button size

* updated docs

* refactor

* Rebase fixes

* Rebase fixes

* rebase fix

* Rebase fixes

* rebase fixes

* reset contributing

This happens because the title-view is being created again when RVVViewController appears. There's probably no point in setting the title-view again with the same data when it already has it. The title view setup is done anyway in RCCNavigationController.

This can be easily reproduced by calling "this.props.navigator.setSubTitle({subtitle: 'a subtitle'});" from the constructor of a pushed screen.

* minor refactor - moved some logic from view o controller

* readme

* doc

* topbar fix

* rm doc

* options presenter fix

* rm userless stuff

* added backgroundImages options

* update readme

* backgroundImage fix

* added unit test

* async await for push and showModal

* async await for push and showModal

* refactored custom transitions

* refactored custom animations

* Now allowing the custom nav bar to take up the whole space on iOS

- Also the custom nav bar reacts well to orientation changes
- Fixes: https://github.com/wix/react-native-navigation/issues/1893

* It now works well on iOS 11 as well

* v1.1.314 [ci skip]

* Added optional fixedWidth property to the Android side menu

    - Fixes: https://github.com/wix/react-native-navigation/issues/510