[Gallery][Wasm] Sticky tabs duplicated

[Darsh0307]

Current behavior

The options for the platform are getting doubled.

Expected behavior

It should be like normal, not have a double screen.

How to reproduce it (as minimally and precisely as possible)

Run Uno gallery Go to the toggle switch option Go to Cupertino, where there will be 2 screens for that (please refer the image above.)

Environment

Nuget Package:

Package Version(s):

Affected platform(s):

• [ ] iOS
• [ ] Android
• [x] WebAssembly
• [ ] WebAssembly renders for Xamarin.Forms
• [ ] Windows
• [ ] Build tasks

Visual Studio:

• [ ] 2017 (version: )
• [ ] 2019 (version: )
• [ ] for Mac (version: )

Relevant plugins:

• [ ] Resharper (version: )

Anything else we need to know?