Add overlay.handleKeyboardEvents options (#5002)

lib/ios/RNNCommandsHandler.m

 	[overlayVC renderTreeAndWait:NO perform:^{
 		UIWindow* overlayWindow = [[RNNOverlayWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
 		overlayWindow.rootViewController = overlayVC;
-		[_overlayManager showOverlayWindow:overlayWindow];
+		if ([overlayVC.resolveOptions.overlay.handleKeyboardEvents getWithDefaultValue:NO]) {
+			[_overlayManager showOverlayWindowAsKeyWindow:overlayWindow];
+		} else {
+			[_overlayManager showOverlayWindow:overlayWindow];
+		}
+		
 		[_eventEmitter sendOnNavigationCommandCompletion:showOverlay commandId:commandId params:@{@"layout": layout}];
 		completion();
 	}];

lib/ios/RNNOverlayManager.h

 @interface RNNOverlayManager : NSObject
 
 - (void)showOverlayWindow:(UIWindow*)viewController;
+- (void)showOverlayWindowAsKeyWindow:(UIWindow *)overlayWindow;
 - (void)dismissOverlay:(UIViewController*)viewController;
 
 @property (nonatomic, retain) NSMutableArray* overlayWindows;

lib/ios/RNNOverlayManager.m

 	[overlayWindow setHidden: NO];
 }
 
+- (void)showOverlayWindowAsKeyWindow:(RNNOverlayWindow *)overlayWindow {
+	[self showOverlayWindow:overlayWindow];
+	[overlayWindow makeKeyWindow];
+}
+
 - (void)dismissOverlay:(UIViewController*)viewController {
 	RNNOverlayWindow* overlayWindow = [self findWindowByRootViewController:viewController];
 	[overlayWindow.previousWindow makeKeyWindow];

lib/ios/RNNOverlayOptions.h

 @interface RNNOverlayOptions : RNNOptions
 
 @property (nonatomic, strong) Bool* interceptTouchOutside;
+@property (nonatomic, strong) Bool* handleKeyboardEvents;
 
 @end

lib/ios/RNNOverlayOptions.m

 	self = [super init];
 	
 	self.interceptTouchOutside = [BoolParser parse:dict key:@"interceptTouchOutside"];
+	self.handleKeyboardEvents = [BoolParser parse:dict key:@"handleKeyboardEvents"];
 	
 	return self;
 }