build number:2.6.0.v20100419-0630

steps to reproduce:
1. new a datasource, set values in property binding pane.
2. copy and paste the data source
3. check pasted data source

expected result:
property binding properties are pasted

actual result:
missed property binding properties.
change the logic in copyutil. property bindings exist in the report/library only.
now all elements' property bindings can be copied correctly.
verified in 2.6.0.v201004290630