Fix disabled text color of an editable ComboBox

Change-Id: I2b38fa17434796be65a88d7c8d14ff94a7e2b233
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>
TextField: Fix binding loop for property font

Change-Id: I752595495a3cb1347eb5f43dcf8ff36044a02e02
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>