[Bug]: Back button doesn't work when send confirmation is re-opened

**Describe the bug**

The "back" button doesn't work right after the extension is opened after being hidden on the Send screen (see video)

**Screenshots/Recordings**

https://github.com/user-attachments/assets/d6490f3c-c48c-42cb-8445-fd5b0aeca72b

**Steps to reproduce**

1. Start a send
2. Get to the confirmation
3. Click elsewhere to close the popup
4. Click on the MM extension icon to open the popup again
5. Click on the back button

**Error messages or log output**

```shell

```

**Detection stage**

During release testing

**Version**

13.5.0

**Build type**

None

**Browser**

Brave

**Operating system**

MacOS

Reproduce the issue in the MetaMask browser extension using the listed Send and confirmation flow, then trace the reopened popup's confirmation view and back-button state. Done means the back button works after closing and reopening the extension popup, while preserving the existing send flow; verify the behavior in Brave on macOS.

Written by the indexing model from the issue text.