Blackberry: Reset virtual keyboard when shown.

The keyboard mode is shared between applications.

You can reproduce this bug by clicking on a spin box,
it will open a number only keyboard, then close the application
and run an application that shows a text edit: a number only
keyboard will appear.

PPS keyboard already does this.

Change-Id: Ia22e96ce13ad0cec1fd3b43fcdf4d03abfc25134
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

src/plugins/platforms/qnx/qqnxvirtualkeyboardbps.cpp

@@ -86,6 +86,11 @@ bool QQnxVirtualKeyboardBps::handleEvent(bps_event_t *event)
 bool QQnxVirtualKeyboardBps::showKeyboard()
 {
     qVirtualKeyboardDebug() << Q_FUNC_INFO << "current visibility=" << isVisible();
+
+    // They keyboard's mode is global between applications, we have to set it each time
+    if ( !isVisible() )
+        applyKeyboardMode(keyboardMode());
+
     virtualkeyboard_show();
     return true;
 }