make pagerow test pass
make pagerow test pass

Summary:
during the pop animation the actual depth differs from the stored one
as the pages that are being popped are still in the data structure
so they have to not be considered for the public depth property

Test Plan: gallery still works, autotests work

Reviewers: #kirigami, apol

Reviewed By: apol

Subscribers: plasma-devel

Tags: #kirigami

Differential Revision: https://phabricator.kde.org/D5868

bearsh/kirigami,bearsh/kirigami