feat(web): make the hint the rightmost longpress key when the keyboard is a right-to-left keyboard

### Is your feature request related to a problem? Please describe.

It's great that the default hint is what is on the longpress keys, but having the default be the leftmost one of the longpress keys is opposite of what the user would want. The user will longpress and then scan or move right to left through the options.

### Describe the solution you'd like

When the keyboard is for a right-to-left language, use the rightmost longpress key. When there are multiple (like more than 3) the bottom rightmost is the one I would want to be the default hint. This rightmost key is the one I'm judging to be the most frequently used and the closes distance for the user.

### Describe alternatives you've considered

_No response_

### Related issues

_No response_

### Keyman apps

- [X] 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

16

### Operating system

_No response_

### Device

_No response_

### Target application

_No response_

### Browser

_No response_

### Keyboard name

_No response_

### Keyboard version

_No response_

### Language name

_No response_

### Additional context

_No response_