bug(windows): Autocomplete in Chrome address bar interferes with Keyman text replacement

From https://community.software.sil.org/t/keyman-for-microsoft-edge/1064/6 (secondary issue noted in the topic):

>If we start typing in the address bar the letter a with acute accent it will appear aá. Only á is correct.

I have now observed this behaviour in the address bar. It happens because the address bar adds extra autocompletion text as you type, so when Keyman tries to delete `a` to replace it with `á`, it ends up deleting the autocompletion suggestion -- Keyman has no way to know that Chrome has added this extra text automatically.