Please cherry-pick to 4.7.1

This has not been requested specifically by device teams, but I still think it's bad enough to include in 4.7.1.

Change:
3bb3af84bef3c0472ca8ed0d5c6bb3c82320956d
3e3ce984b54a0b199bf5d4f5e3dcb0a9d5b5bd79

Basically it is a regression in Qt for Symbian since 4.6.3, which makes all QPlainTextEdits and QTextEdits become completely unusable (cannot be typed into) together with qwerty keyboards. So it'll work (sort of) as long as the N8 is in portrait mode, with an alphanumeric keyboard, but breaks completely when the phone is in landscape mode and uses qwerty keyboard.