[UX Flow] Pending Sol Tx Screen unclear User Action

### What is this about?


After confirming a transaction this screen is shown to the user. It is not clear if the user has to complete any action or if the user can click on close without cancelling the transaction.

### Scenario

_No response_

### Design

_No response_

### Technical Details

_No response_

### Threat Modeling Framework

_No response_

### Acceptance Criteria

_No response_

### Stakeholder review needed before the work gets merged

- [x] Engineering (needed in most cases)
- [x] Design
- [x] Product
- [ ] QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
- [ ] Security
- [ ] Legal
- [ ] Marketing
- [ ] Management (please specify)
- [ ] Other (please specify)

### References

_No response_

Start by locating the pending Sol transaction screen in the MetaMask extension and compare its current behavior with the attached screenshot. Clarify whether closing the screen should leave the transaction pending or cancel it, then update the UX so the required action and close behavior are explicit. Done means users can understand what to do without ambiguity.

Written by the indexing model from the issue text.