- Fix windows flags for DesktopPopup
- Merge notification creation and show macros
- Store height offset for each screens (key: screen name)
- Create a Visual Root Window for each notifications
- Put each Visual Root Windows behind its notification to get visually only one entity
- Bind each Visual Root Window to a Screen
- Propagate events between visual objects in order to use only one
- Add open/close events
- Add missing anchors
- Avoid using window as a keyword