bug(windows): Replacing selected text in Word loses formatting

More information from the [post](https://community.software.sil.org/t/extra-character-deleted-with-selected-text-in-microsoft-word/8846/7):

> Hello! I’d like to report another bug, hoping this is useful. It’s a similar issue: when selecting a text and there’s no character to delete, the text formating is deleted instead.
>
> For example, if a text is bold and in italics, and I double click on it to overwrite it with new text, it comes out as regular (again, if there’s no extra character to delete, e.g. at the beginning of a paragraph.


_Originally posted by @Nnyny in https://github.com/keymanapp/keyman/issues/7870#issuecomment-2188066467_