[Bug]: Wallet API - Switch networks with Add Tokens popup open, keeps that popup open with no tokens

### Describe the bug

Whenever I've performed and Add token action, while having that popup open, if I switch networks I see how the MM pending actions are cleared but the popup remains open with no token list.

### Expected behavior

I think we should close automatically the MM popup, in the same way the pending action is cleared from the icon

### Screenshots/Recordings

https://github.com/user-attachments/assets/1e5311a0-a5e2-4d4b-b62e-1cdd77819177

### Steps to reproduce

1. Go to the test dapp
2. Deploy an ERC20 token contract
3. Click Add token
4. Leave that window open and go to the full view
5. Change networks
6. See how the pending action is cleared but the poup remains open with no tokens

### Error messages or log output

_No response_

### Detection stage

In production (default)

### Version

12.3.1

### Build type

None

### Browser

Chrome

### Operating system

Linux

### Hardware wallet

_No response_

### Additional context

_No response_

### Severity

_No response_

Start with the test dapp flow: open Add token, move to the full view, and switch networks while the popup is open. Trace the Add token popup and network-switch behavior; done means the popup closes when the pending action is cleared, rather than remaining open with an empty token list.

Written by the indexing model from the issue text.