Bug 146976 Save state of the report not correct.
Reproduce: 1) New a library "lib1", add a label "label1" 2) Publish "lib1" 3) New a report "report1", use "lib1" 4) Drag "lib1.label1" into "report1" 5) Go back to "lib1", drop "label1", save and publish again. 6) Go to "report1", refresh the libaray explorer and design. 7) Save "report1" 8) Now, we go back to "lib1" 9) Undo the previous "delete command", "label1" is added back. 10) Save "lib1", and re-publish. 11) Go to "report1", refresh the libaray explorer and design. 12) Save "report1" At this stage, "report1" is saved, but the dirty indicator(*) still displayed in the left side of the report name. I am testing on build N20060613
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
* 
	 * @return A handle for working with the data sets.
	 */
	public SlotHandle getDataSets( )
	{
		return getSlot( DATA_SET_SLOT );
	}
	/**
	 * Returns a slot handle to work with the data sources within the report.
	 * Note that the order of the data sources within the slot is unimportant.
	 * 
	 * @return A handle for working with the data sources.
	 */
	public SlotHandle getDataSources( )
	{
		return getSlot( DATA_SOURCE_SLOT );
	}
	/**
	 * Returns the default units for the design. These are the units that are
	 * used for dimensions that don't explicitly specify units.
	 * 
	 * @return the default units for the design.
	 * @see org.eclipse.birt.report.model.api.metadata.DimensionValue
	 */
	public String getDefaultUnits( )
	{
		return module.getUnits( );
	}
	/**
	 * Sets the default units for the design. These are the units that are used