In order to avoid the test host interfering too badly with the debugger,
we will bypass SendInput and instead post all input to the local edit
window. This can result in out-of-sequence input for rapid typing, but
for a test host this is not important -- it's better that the input
doesn't end up in the debugger window due to focus changes!
Scratching an itch. It's very painful to debug Keyman Core on Windows.
This helps a little. It allows you to step through the code without
loading keyman32.dll into every process. It's not perfect, because when
actions are sent, they tend to land in the debugger because SendInput
does not care about the active window! However, if you don't care
about that too much (or if you are willing to try a remote debug setup),
then this should really simplify debugging.
