Replace transparent Rectangle with Item
Replace transparent Rectangle with Item

Item is not painted at all, which is marginally faster than painting
a transparent rectangle.

RevBy: Pekka Vuorela, Robin Burchell

develersrl/maliit-demo-qml,maliit/plugins,RHawkeyed/plugins,maliit/plugins,develersrl/maliit-demo-qml,RHawkeyed/plugins,RHawkeyed/plugins,develersrl/maliit-demo-qml,develersrl/maliit-demo-qml,KDE/plasma-maliit-plugins,KDE/plasma-maliit-plugins,maliit/plugins,KDE/plasma-maliit-plugins,maliit/plugins,RHawkeyed/plugins,RHawkeyed/plugins,KDE/plasma-maliit-plugins