Add iOS support for `bottomTabs.attachMode`.
This property controls when BottomTabs children are attached to hierarchy and when their React views are created.

By default, RNN attaches all children at the same time which might impact loading time as a few screens are instantiated at once.
Using `afterInitialTab` or `onSwitchToTab` generally leads to improved start up time.

* Dismiss presented modals and clear the component store on reload

* Detach all overlays on react reload

* Move synchronous dismissing modals to modalManager

* Fix iOS unit tests

Break all the PRs :(

iOS and Android code base used different naming conventions - this commit aims to unify naming conventions. I probably missed a few properties here and there so this will be an ongoing effort.

* Stop manually manage viewControllers store, Iterate layout instead

* Update RNNCommandsHandlerTest.m

* Remove currentLeaf

* Fix resolve options

* Remove irrelevant test

* Remove RNNRootViewController clear background color

* Fix title with subtitle options

* Layout changes

* WIP

* Revert "Layout changes"

This reverts commit 4da8cfbd12.

* Clean topBar.component and topBar.background.component when not needed

* Move custom components login from viewController to presenters

* Change waitForRender and enabled property from primitive bool to Bool object

* Fix ios unit tests

* Add unit tests

* Remove RNNReactView observer when view ready

* Load react components from component manager

* Remove createCustomReactView duplication

* Handle render children in each Layout

* Wait for navigation presenter components render, refactor RNNTitleViewHelper

* Fix unit tests

* Add waitForRender for custom react components

* Fixes e2e

Initialize and pass mainWindow to commandsHandler

* Provide findViewController api method

* Fix merge changes

* Optional resizeMode

* Update Element typings

This allows developers more control over how the app is launched, in a backwards-compatible way.