Set default border value in all places
The comment says this should match the default border setting in Breeze. Unfortunately it already doesn't. This patch makes it match the new border size in D13481: Recommend window border size "None".
Depends on D13481
Reviewers: Breeze, abetts
Reviewed By: abetts
Subscribers: abetts, plasma-devel
Maniphest Tasks: T8707
Differential Revision: https://phabricator.kde.org/D13278