bug(ios): Keyman keyboard does not appear on the keyboard search page.

### Describe the bug

A blank screen appears at the bottom of the mobile display. if the keyboard is set system-wide.

### Reproduce the bug

Steps to reproduce:

1. Install "Keyman-19.0.61-alpha" build on 11/06/2025.
2. On the "Get Started" dialog.
3. Check the "Enable Keyman as system-wide keyboard" box.
4. Navigate to the keyboard search page by clicking the three dots --> settings --> installed languages --> English --> plus button.
5. Click in the search box.
6. Actual Results: Here, the keyboard is not visible; instead, a blank screen appears at the bottom of the mobile display.

### Expected behavior

_No response_

### Related issues

_No response_

### Keyman apps

- [ ] Keyman for Android
- [x] Keyman for iPhone and iPad
- [ ] Keyman for Linux
- [ ] Keyman for macOS
- [ ] Keyman for Windows
- [ ] Keyman Developer
- [ ] KeymanWeb
- [ ] Other - give details at bottom of form

### Keyman version

19.0.61-alpha

### Operating system

iOS 17.4

### Device

iPhone 13

### Target application

_No response_

### Browser

_No response_

### Keyboard name

_No response_

### Keyboard version

_No response_

### Language name

_No response_

### Additional context

_No response_