http://work.netxforge.com/issues/403
- refactored the way viewers process a Selection via linking or show-in,
later on with dnd. 
- Issue with Call-back on interrested object, for which
the Transaction might not be alive, while still shown in a Viewer. 
- Suport for merge or add in multicharts.
TODO: Markers, Util, Cap series.
http://work.netxforge.com/issues/403
- Support for DnD in multicharts. 
- Remove screen linking for multicharts.
- Fixed scrolling on multicharts. 
- Catch sum exceptions. 
TODO, recover markers, util, capacity. 
TODO trending.
- refactor / unused import
http://work.netxforge.com/issues/403
- Fixed markers for multiple line. 
- Bug with ChartModel injection, converted to a provider. 
- couple of DataScreen issues.
http://work.netxforge.com/issues/409 (First commit). 
version 2.2.0