bug(mac): Hotkeys failed to switch before & after input modifier for IPA (SIL) keyboard

### Describe the bug

Originated from https://community.software.sil.org/t/keyman-hotkey-ordering-after-install-on-mac/11221

### Reproduce the bug

1. Launch TextEdit
2. Ensure IPA (SIL) keyboard is enabled
3. Type b=, resulted in β
4. Press RIGHT OPTION + - to switch to BEFORE option for input modifier
5. Type =b, resulted in =b

### Expected behavior

The hotkeys should work to switch between BEFORE and AFTER as mentioned in the community site.

### Related issues

#14675

### Keyman apps

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

### Keyman version

19.0.198

### Operating system

macOS Sequoia 15.7.4

### Device

MacBook Pro

### Target application

TextEdit

### Browser

_No response_

### Keyboard name

https://keyman.com/keyboards/sil_ipa

### Keyboard version

2.0.2

### Language name

Undetermined

### Additional context

_No response_