bug(windows): Key processing with text selection problems (legacy)

[ermshiperete]

The test cases for the Text Selection and Key Processing spec with a legacy app on Windows 10 show some limitations.

See here for the test cases and the google doc for the test results.

Keyman 16.0.142
Windows 10.0.19045
Google Chrome 119.0.6045.124

Failed tests

1. (T02) ^⁞X the quick brown fox⁞ in doc. Typing BKSP, then A.
   Expected result: Â⁞
   Actual result: ^A⁞
2. (T04) ^⁞X⁞ in doc. Typing A.
   Expected result: Â⁞
   Actual result: ^A⁞
3. (T05) ^⁞X the quick brown fox⁞ in doc. Typing A.
   Expected result: Â⁞
   Actual result: ^A⁞
4. (T07) ^⁞X⁞ in doc. Typing BKSP, BKSP.
   Expected result: foo⁞
   Actual result: ⁞

[mcdurdin]

Can you add application and operating system version here? The results are likely to differ with TSF vs legacy input