The account key should fit into the text box in the mobile view

### Please agree to the following

- [X] I have searched [existing issues](https://github.com/cryptomator/hub/issues?q=) for duplicates
- [X] I agree to follow this project's [Code of Conduct](https://github.com/cryptomator/hub/blob/develop/.github/CODE_OF_CONDUCT.md)

### Summary

The account key should fit into the text box in the mobile view.

### System Setup

```markdown
- Hub: 1.3.4
```

### Steps to Reproduce

Open unregistered user in mobile browser

### Expected Behavior

Full account key is shown

### Actual Behavior

### Reproducibility

Always

### Relevant Log Output

_No response_

### Anything else?

_No response_