placement: make new window cascading optional
Cascading behaviour was introduced with !3229 (merged)
This change makes the cascading behaviour optional, which:
- allows users to disable it if preferred
- fixes the issue that without this option the window placement
policies no longer do explicitly what they say they do (e.g. setting
the placement policy to
Center
, and having windows sometimes not opening centered without the user knowing why)
Before | After |
---|---|