winrt: isAutoRepeat value not set for character keys

On key down the isAutoRepeat value is not being correctly set for character keys.

The sequence of key events looks something like:

[9640] KEY EVENT QKeyEvent(KeyPress, Key_S, text="s")
[9640] KEY EVENT QKeyEvent(KeyRelease, Key_S, autorepeat, count=1)
[9640] KEY EVENT QKeyEvent(KeyPress, Key_S, text="s")
[9640] KEY EVENT QKeyEvent(KeyRelease, Key_S, autorepeat, count=1)
[9640] KEY EVENT QKeyEvent(KeyPress, Key_S, text="s")
[9640] KEY EVENT QKeyEvent(KeyRelease, Key_S, autorepeat, count=1)
[9640] KEY EVENT QKeyEvent(KeyPress, Key_S, text="s")
[9640] KEY EVENT QKeyEvent(KeyRelease, Key_S, text="s")

It looks like CorePhysicalKeyStatus.RepeatCount property is not set by Windows for the CharacterReceived event.

However this is correctly set in the KeyDown event, so one potential solution is to extend the KeyInfo struct and store the RepeatCount value in that on onKeyDown(), and then use that value when processing the CharacterReceived event.