Client: Fix inverse repeat rate implementation

The rate from wl_keyboard.repeat_info was used as if it was an interval. Fixed
by converting from key strokes per second to milliseconds per key stroke.

This fixes a regression, as repeat rate used to be hard-coded to something
sensible before.

[ChangeLog][QPA plugin] Fixed keyboard repeat rate being set inversely, so
higher rates would actually result in fewer characters per second, and vice
versa.

Fixes: QTBUG-80613
Change-Id: Ie783b90cba13dde6f37c0cd1be584d352cddfe7c
Reviewed-by: David Edmundson <davidedmundson@kde.org>
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

src/plugins/platforms/wayland/qwaylandinputdevice.cpp

@@ -88,7 +88,7 @@ QWaylandInputDevice::Keyboard::Keyboard(QWaylandInputDevice *p)
             // or the server didn't send an enter event first.
             return;
         }
-        mRepeatTimer.setInterval(mRepeatRate);
+        mRepeatTimer.setInterval(1000 / mRepeatRate);
         handleKey(mRepeatKey.time, QEvent::KeyRelease, mRepeatKey.key, mRepeatKey.modifiers,
                   mRepeatKey.code, mRepeatKey.nativeVirtualKey, mRepeatKey.nativeModifiers,
                   mRepeatKey.text, true);