Change-Id: I89aa205686f0bdf2b267ad17a8ae0470c2f4751f
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>

Add 'type' property to QtMenuBase (not exposed to QML explicitly,
but is the base class for all things menu). Useful to inspect menu items
after creation, for instance. Also, Menu gets addSeparator() and
addMenu() functions.

Since the Iterator type has been merged to QML, tst_menu now uses it.

Change-Id: I4a2f43ecce6671885e523d720e4e1315eca8616e
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>

In the near future, we hope that QML types like Creator/Instantiator
(currently under review) will help simplify model binding, and object
creation and deletion. Also, given the differences between QML models
and QAbstractItemModel APIs, it's hard to provide a unified and
elegant solution for this right now.

ComboBox gets the part of the logic that ContextMenu was responsible
for, extended to support string list and number models. Auto-tests
updated and XFAIL removed where applicable.

Change-Id: I9f5d4059644c495bffff76fb7c353e6fe7fde62e
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>