Inconsistent page fade ins

[Michael Terry]

The mobile page animates in with an opacity fade. But no other pages I noticed do. Seems like a mistake the way it is. Running current RC-proposed as of today.

[Matthew Paul Thomas (mpt)]

Reproduced in 15.04 r323.

This seems to be the culprit:
<http://bazaar.launchpad.net/~system-settings-touch/ubuntu-system-settings/trunk/view/head:/plugins/cellular/PageComponent.qml#L129>
    Flickable {
        …
        Behavior on opacity {
            PropertyAnimation {
                duration: UbuntuAnimation.SlowDuration
            }
        }
        …
    }

Ideally hardly anything on-screen would just appear suddenly, so I like the idea of fading in those page-stack elements that appeared too slowly to slide in with the page itself. But that should happen with *every* page stack page, not just one particular page in System Settings.