Qt.createComponent() is used weidly

I several places Neochat does something like Qt.createComponent("org.kde.neochat.settings", "NetworkProxyPage.qml"). It should probably be NetworkProxyPage without the .qml.

It seems to work, but isn't how the API is intended to be used and causes an assert inside Qt: https://bugreports.qt.io/browse/QTBUG-124225