# 0.27.0
* break: split current Placement into Placement and PopupConstraint.
The first contains only the flags. Can be used by other widgets now.
* feature: Add new Placement variants: Left,Right,Above,Below - just synonyms.
AboveOrBelow, BelowOrAbove: Switch places depending on available space.
* feature: add PopupStyle
* feature: add PopupCore::xxx_opt()
* feature: add Scroll support for PopupCore.
# 0.26.0
* break: final renames in rat-focus.
# 0.25.0
* feat: Initial release.
Took some inspiration from PopupMenu and generalized this.
Reimplemented PopupMenu with PopupCore afterwards .