Apply button options on viewController init

lib/ios/RNNViewControllerPresenter.m

 	if (options.topBar.searchBar.hasValue) {
 		[viewController rnn_setSearchBarWithPlaceholder:[options.topBar.searchBarPlaceholder getWithDefaultValue:@""]];
 	}
-	
-	if ((options.topBar.leftButtons || options.topBar.rightButtons)) {
-		[_navigationButtons applyLeftButtons:options.topBar.leftButtons rightButtons:options.topBar.rightButtons defaultLeftButtonStyle:options.topBar.leftButtonStyle defaultRightButtonStyle:options.topBar.rightButtonStyle];
-	}
 }
 
 - (void)applyOptionsOnInit:(RNNNavigationOptions *)options {
 	[viewController rnn_setModalTransitionStyle:[RCTConvert UIModalTransitionStyle:[options.modalTransitionStyle getWithDefaultValue:@"coverVertical"]]];
 	[viewController rnn_setDrawBehindTopBar:[options.topBar.drawBehind getWithDefaultValue:NO]];
 	[viewController rnn_setDrawBehindTabBar:[options.bottomTabs.drawBehind getWithDefaultValue:NO] || ![options.bottomTabs.visible getWithDefaultValue:YES]];
+	
+	if ((options.topBar.leftButtons || options.topBar.rightButtons)) {
+		[_navigationButtons applyLeftButtons:options.topBar.leftButtons rightButtons:options.topBar.rightButtons defaultLeftButtonStyle:options.topBar.leftButtonStyle defaultRightButtonStyle:options.topBar.rightButtonStyle];
+	}
 }
 
 - (void)mergeOptions:(RNNNavigationOptions *)newOptions currentOptions:(RNNNavigationOptions *)currentOptions defaultOptions:(RNNNavigationOptions *)defaultOptions {

lib/ios/ReactNativeNavigationTests/RNNRootViewControllerTest.m

 
 -(void)testRightButtonsWithTitle_withoutStyle {
 	self.options.topBar.rightButtons = @[@{@"id": @"testId", @"text": @"test"}];
-	__unused RNNNavigationController* nav = [self createNavigationController];
-	[self.uut viewWillAppear:false];
+	self.uut = [[RNNRootViewController alloc] initWithLayoutInfo:nil rootViewCreator:nil eventEmitter:nil presenter:[RNNViewControllerPresenter new] options:self.options defaultOptions:nil];
+	RNNNavigationController* nav = [[RNNNavigationController alloc] initWithLayoutInfo:nil childViewControllers:@[self.uut] options:nil defaultOptions:nil presenter:nil];
 
 	RNNUIBarButtonItem* button = (RNNUIBarButtonItem*)[nav.topViewController.navigationItem.rightBarButtonItems objectAtIndex:0];
 	NSString* expectedButtonId = @"testId";
 	NSNumber* inputColor = @(0xFFFF0000);
 
 	self.options.topBar.rightButtons = @[@{@"id": @"testId", @"text": @"test", @"enabled": @false, @"buttonColor": inputColor, @"buttonFontSize": @22, @"buttonFontWeight": @"800"}];
-	__unused RNNNavigationController* nav = [self createNavigationController];
-	[self.uut viewWillAppear:false];
+	self.uut = [[RNNRootViewController alloc] initWithLayoutInfo:nil rootViewCreator:nil eventEmitter:nil presenter:[RNNViewControllerPresenter new] options:self.options defaultOptions:nil];
+	RNNNavigationController* nav = [[RNNNavigationController alloc] initWithLayoutInfo:nil childViewControllers:@[self.uut] options:nil defaultOptions:nil presenter:nil];
 
 	RNNUIBarButtonItem* button = (RNNUIBarButtonItem*)[nav.topViewController.navigationItem.rightBarButtonItems objectAtIndex:0];
 	NSString* expectedButtonId = @"testId";
 
 -(void)testLeftButtonsWithTitle_withoutStyle {
 	self.options.topBar.leftButtons = @[@{@"id": @"testId", @"text": @"test"}];
-	__unused RNNNavigationController* nav = [self createNavigationController];
-	[self.uut viewWillAppear:false];
+	self.uut = [[RNNRootViewController alloc] initWithLayoutInfo:nil rootViewCreator:nil eventEmitter:nil presenter:[RNNViewControllerPresenter new] options:self.options defaultOptions:nil];
+	RNNNavigationController* nav = [[RNNNavigationController alloc] initWithLayoutInfo:nil childViewControllers:@[self.uut] options:nil defaultOptions:nil presenter:nil];
 
 	RNNUIBarButtonItem* button = (RNNUIBarButtonItem*)[nav.topViewController.navigationItem.leftBarButtonItems objectAtIndex:0];
 	NSString* expectedButtonId = @"testId";
 	NSNumber* inputColor = @(0xFFFF0000);
 
 	self.options.topBar.leftButtons = @[@{@"id": @"testId", @"text": @"test", @"enabled": @false, @"buttonColor": inputColor, @"buttonFontSize": @22, @"buttonFontWeight": @"800"}];
-	__unused RNNNavigationController* nav = [self createNavigationController];
-
-	[self.uut viewWillAppear:false];
+	self.uut = [[RNNRootViewController alloc] initWithLayoutInfo:nil rootViewCreator:nil eventEmitter:nil presenter:[RNNViewControllerPresenter new] options:self.options defaultOptions:nil];
+	RNNNavigationController* nav = [[RNNNavigationController alloc] initWithLayoutInfo:nil childViewControllers:@[self.uut] options:nil defaultOptions:nil presenter:nil];
 
 	RNNUIBarButtonItem* button = (RNNUIBarButtonItem*)[nav.topViewController.navigationItem.leftBarButtonItems objectAtIndex:0];
 	NSString* expectedButtonId = @"testId";