bug(windows): compatibility with thunderbird/firefox 139.0+ typing space does not correctly align the cursor after the space.

### Describe the bug

Reproducible from: https://community.software.sil.org/t/keyman-not-showing-spaces-in-thunderbird/10253

> I am using a new Dell Computer and the latest version of Thunderbird for email. Using the Keyman keyboard for my language (Areare), the space bar inserts spaces, but the cursor doesn’t move. Also, the cursor will jump back to the previously typed text if there are other spaces before the cursor that were typed with a standard keyboard

Typing space with keyman keyboard does not correctly align the cursor behind the space.

### Reproduce the bug

1. Get ThunderBird `v139.0.1`
2. Click on "+ New Message" in Mail
3. Start typing in the Body text with a Keyman keyboard
4. Result:

### Expected behavior

1. Insert space where it is typed

### Related issues

_No response_

### Keyman apps

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

### Keyman version

19.0.40-alpha

### Operating system

Windows 10 Home v2009 (Bootcamp)

### Device

MacBook Pro

### Target application

Thunderbird v139.0 & v139.0.1

### Browser

_No response_

### Keyboard name

areare

### Keyboard version

1.1

### Language name

alu-Latn-SB

### Additional context

Another keyboard: US Basic v1.2 `en-us`
The issue is found in v139.0 and v139.0.1. Versions below that is fine to use.