Added remove button for default providers

[aminsaedi]

I added a simple button to remove a provider ( #465 )

I'm not sure if I did it right. I would appreciate it if you could help me how can I test this locally to make sure everything is correct

[zorn-v]

You can simply clear "app id" to not show button in login page

[zorn-v]

But explicit button is good idea

[zorn-v]

Did you check final result of your PR ? It just did not remove provider by the way - only button (google in screensot) Anyway thanks for idea