Add comments to semantic zoom level change part of GenericHandler
Remove unnecessary update
Introduce set cursor event for global zoom change
Add comment to basicStrategy
Fix overscale issue in setItemScale
Add ArrangementAlgorithmItem class to be used by the arrangment algorithm
Clean up arrangment algorithm
Add saving geometric scales for the automatic semantic zoom level change
Fix bug related to switching the semantic zoom level
Rename semantic zoom levels
Correct automatic abstraction semantic zoom level
Remove former high level semantic zoom level visualization