Use the same style mask everywhere

Author: Saadnajmi

packages/react-native/React/CoreModules/RCTDevLoadingView.mm

@@ -130,7 +130,7 @@ - (void)showMessage:(NSString *)message color:(RCTUIColor *)color backgroundColo
     self->_window.rootViewController = [UIViewController new];
 #else // [macOS
     self->_window = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 375, 20)
-                                               styleMask:NSWindowStyleMaskBorderless
+                                               styleMask:NSWindowStyleMaskBorderless | NSWindowStyleMaskFullSizeContentView
                                                  backing:NSBackingStoreBuffered
                                                    defer:YES];
     [self->_window setIdentifier:sRCTDevLoadingViewWindowIdentifier];

packages/react-native/React/CoreModules/RCTLogBoxView.mm

@@ -79,7 +79,11 @@ - (instancetype)initWithWindow:(RCTPlatformWindow *)window surfacePresenter:(id<
 #if !TARGET_OS_OSX // [macOS]
   self = [super initWithWindowScene:window.windowScene];
 #else // [macOS
-  self = [super initWithContentRect:NSMakeRect(0, 0, 600, 800) styleMask:NSWindowStyleMaskTitled backing:NSBackingStoreBuffered defer:YES];
+  self = [super
+          initWithContentRect:NSMakeRect(0, 0, 600, 800)
+          styleMask:NSWindowStyleMaskBorderless | NSWindowStyleMaskFullSizeContentView
+          backing:NSBackingStoreBuffered
+          defer:YES];
   _window = window;
 #endif // macOS]