WalletChat Integration UI Fixes

[izuchukwu-eric]

Description

This PR contains requested changes and bug fixes as regarding the integration of WalletChat.

• Improved loading state of the WalletChat iframe when clicked
• Addressed styling issues for both web and android
• X button to close out the WalletChat iframe

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How Has This Been Tested?

Changes has been tested by the GD team

Please describe the tests that you ran to verify your changes.

Checklist:

• PR title matches follow: (Feature|Bug|Chore) Task Name
• My code follows the style guidelines of this project
• I have followed all the instructions described in the initial task (check Definitions of Done)
• I have performed a self-review of my own code
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have added reference to a related issue in the repository
• I have added a detailed description of the changes proposed in the pull request. I am as descriptive as possible, assisting reviewers as much as possible.
• I have added screenshots related to my pull request (for frontend tasks)
• I have pasted a gif showing the feature.
• @mentions of the person or team responsible for reviewing proposed changes

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