Doc: update Qt Quick Designer screenshots

Change-Id: I2dceb9a186da5a340a7c2286aa3bdc9a2c622077
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Port KDE paste protocol to new service.

Extract base class for 'Sticky Notes' service with settable
parameters (for adding a custom-configureable 'Sticky Notes'
service later on) and derive KDE service from it.

Task-number: QTCREATORBUG-9995
Change-Id: I92c6e5ae45b498bf7ccc260c2ef4ca6e3e0ebf19
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@digia.com>