Fixed: Close button added for signup and login form

[chandiran-v]

Pull Request

Related Issues: Added close button for both signup and login button.

Fixes #231

Description: Created separate svg for close icon and added close functionality to signup and login form.

Checklist:

• [x] I have tested my changes.
• [x] My code follows the project's coding standards.
• [ ] Screenshots:

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[ani1609]

@chandiran-v perfection!

[chandiran-v]

@chandiran-v perfection!

Thanks, sounds great.