QmlDesigner: Use NodeAbstractProperty.indexOf

Change-Id: I9f533e048aa22f6ad1e638c93f97dfb5350dd159
Reviewed-by: Marco Bubke <marco.bubke@digia.com>
QmlDesigner: Use count method of NodeListProperty

Don't create a ModelNode list.

Change-Id: I646418ff8ad2f5e19f2c6ca6735a6e73ea5c4ae6
Reviewed-by: Marco Bubke <marco.bubke@digia.com>
QmlDesigner: Use NodeListProperty.count

Change-Id: I71617862fd749f97933b7bb0387cc73f11b82a03
Reviewed-by: Marco Bubke <marco.bubke@digia.com>
QmnlDesigner: Use the list methodes in NodeListProperty

Don't create a list which is expensive.

Change-Id: I13d0e211d106d06a2a9cd78d32613b445695faa5
Reviewed-by: Marco Bubke <marco.bubke@digia.com>
Use more descriptive progress bar titles

Change-Id: I70450a2aa675d69f820de48dd75909f36051efe0
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>