Check 'node' for NULL before derefencing it, not after

Change-Id: Iab4b28997d9d13645375284083e4e603e02cec5c
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Martin Smith <martin.smith@digia.com>
QNetworkAccessManager: store QNetworkConfiguration instead of identifier

In case a network session is not required, we need access to the
configuration object rather than to the QString.

Change-Id: I05945525ce8247e343d0bebd7ec15e0e162ed826
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
Reviewed-by: Shane Kearns <shane.kearns@accenture.com>
QNetworkAccessManager: track online / accessible state without session

In particular, set online state right upon construction of the
QNetworkAccessManager instance. Therefor, QNAM needs an instance of a
QNetworkConfigurationManager internally.
Before, this would only work properly if a network session was created.
Now, networkAccessible() returns the correct status.

Change-Id: I7ff9ccfd18ad376a131fc5977843b55bf185fba0
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
Reviewed-by: Shane Kearns <shane.kearns@accenture.com>
Improve QTextEngine::elidedText() in TextShowMnemonic mode

Check if the sequence is really a mnemonic and emulate grapheme cluster if so,
rather than blindly reset the next character's attributes.
This covers cases like "& ", "&<U+034F>", etc.

Change-Id: Ibb063a2d258aff6455b9bb41bbe1a58a5036d0d6
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>