sign up button disappears when successfully signed up

[HetviSoni]

Notes for Reviewers

This PR fixes #105
I have added a handleSignUpFormSubmit function in the parent component of Navigation and SignupForm (ie App) which handles the appearance/disappearance of the signup button in the header.

Meshery.CNCF.Playground._.Cloud.Native.Manager.for.Kubernetes.and.all.CNCF.projects.-.Google.Chrome.2023-05-11.13-19-21.mp4

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[thisiskaransgit]

@HetviSoni The change is working as intended, resolve the merge conflicts and we are good to go

[HetviSoni]

@HetviSoni The change is working as intended, resolve the merge conflicts and we are good to go

Done

[thisiskaransgit]

Looks good to merge, thank you for your contribution 🎉

[leecalcote]

Uh-oh, we have a merge conflict, @HetviSoni. Will you address this, please?

@Savio629 will you give this a review, too?

[HetviSoni]

Uh-oh, we have a merge conflict, @HetviSoni. Will you address this, please?

@Savio629 will you give this a review, too?

Resolved👍

[Savio629]

LGTM 👍

[leecalcote]

Uh-oh, a merge conflict has popped up

[HetviSoni]

Uh-oh, a merge conflict has popped up

Resolved👍 :)

[HetviSoni]

This pr has been open for a while now. It would be helpful if is merged or if any other changes are required, please suggest
@leecalcote @Savio629 @thisiskaransgit