bug(web): the in-app Khmer Angkor caption name doesn't fit on the OSK's Spacebar on mobile devices

### Describe the bug

I noticed that after installing the Khmer Angkor keyboard, the caption name does not fit on the OSK's Spacebar.

### Reproduce the bug

1. Install Keyman 17.0.303-beta.
2. Open Keyman In-app.
3. Download and Install Khmer Angkor Keyboard.
4. Switched to Khmer Angkor Keyboard.

Here, I noticed the the Khmer Angkor caption name does not fit into the space bar key.

Note: It is working fine on Android OS.

..in Android Mobile

..in iPhone Mobile

### Expected behavior

Khmer Angkor Caption name should be fully visible on the Spacebar key.

### 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

17.0.303-beta

### Operating system

iOS 17.4

### Device

iPhone 13 Mobile

### Target application

_No response_

### Browser

_No response_

### Keyboard name

khmer_angkor

### Keyboard version

1.3

### Language name

Khmer

### Additional context

_No response_