Summary:
The new slide effect tries to separate each virtual desktop
as much as possible. This separation makes the new slide
effect more intuitive than the old one.
Test Plan:
* switch between virtual desktops
* or, move a window to another virtual desktop
Reviewers: #vdg, #kwin, #plasma, graesslin, ngraham
Reviewed By: #kwin, #plasma, graesslin
Subscribers: mart, graesslin, abetts, ngraham, plasma-devel, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D9638