fix(ios): prevent statusbar rotation after closing InAppBrowser (apache#672)

Author: jcesarmobile

src/ios/CDVWKInAppBrowser.m

@@ -324,6 +324,7 @@ - (void)hide:(CDVInvokedUrlCommand*)command
     // Set tmpWindow to hidden to make main webview responsive to touch again
     // https://stackoverflow.com/questions/4544489/how-to-remove-a-uiwindow
     self->tmpWindow.hidden = YES;
+    self->tmpWindow = nil;
 
     if (self.inAppBrowserViewController == nil) {
         NSLog(@"Tried to hide IAB after it was closed.");
@@ -677,7 +678,8 @@ - (void)browserExit
     // Set tmpWindow to hidden to make main webview responsive to touch again
     // Based on https://stackoverflow.com/questions/4544489/how-to-remove-a-uiwindow
     self->tmpWindow.hidden = YES;
-    
+    self->tmpWindow = nil;
+
     if (IsAtLeastiOSVersion(@"7.0")) {
         if (_previousStatusBarStyle != -1) {
             [[UIApplication sharedApplication] setStatusBarStyle:_previousStatusBarStyle];