Expose searchEdit accessible property to Qt Quick

Change-Id: I9230deaa75d1e9a9614f364d4adf92349c8a1901
Reviewed-by: Jan Arve Sæther <jan-arve.saether@theqtcompany.com>

src/quick/items/qquickaccessibleattached.cpp

@@ -179,6 +179,12 @@ QT_BEGIN_NAMESPACE
 
     By default this property is \c false.
 */
+/*! \qmlproperty bool QtQuick::Accessible::searchEdit
+    \brief This property holds whether this item is input for a search query.
+    This property will only affect editable text.
+
+    By default this property is \c false.
+*/
 /*! \qmlproperty bool QtQuick::Accessible::ignored
     \brief This property holds whether this item should be ignored by the accessibility framework.
 

src/quick/items/qquickaccessibleattached_p.h

@@ -88,6 +88,7 @@ public:
     STATE_PROPERTY(defaultButton)
     STATE_PROPERTY(passwordEdit)
     STATE_PROPERTY(selectableText)
+    STATE_PROPERTY(searchEdit)
 
     QQuickAccessibleAttached(QObject *parent);
     ~QQuickAccessibleAttached();