fixed toggle tabs bug (#2369)

ios/RCCTabBarController.h

 - (instancetype)initWithProps:(NSDictionary *)props children:(NSArray *)children globalProps:(NSDictionary*)globalProps bridge:(RCTBridge *)bridge;
 - (void)performAction:(NSString*)performAction actionParams:(NSDictionary*)actionParams bridge:(RCTBridge *)bridge completion:(void (^)(void))completion;
 
+@property (nonatomic) BOOL tabBarHidden;
+
 @end

ios/RCCTabBarController.m

   if ([performAction isEqualToString:@"setTabBarHidden"])
   {
     BOOL hidden = [actionParams[@"hidden"] boolValue];
+    self.tabBarHidden = hidden;
     
     CGRect nextFrame = self.tabBar.frame;
     nextFrame.origin.y = UIScreen.mainScreen.bounds.size.height - (hidden ? 0 : self.tabBar.frame.size.height);

ios/RCCViewController.m

 - (BOOL)hidesBottomBarWhenPushed
 {
   if (!self._hidesBottomBarWhenPushed) return NO;
-  return (self.navigationController.topViewController == self);
+  return (self.navigationController.topViewController == self) && ![(RCCTabBarController*)self.tabBarController tabBarHidden];
 }
 
 - (BOOL)prefersStatusBarHidden