Bug 176161 styles cannot be sortet/ordered in the outline view
1) create a library 2) add a theme 3) add some styles to the theme ==> the styles cannot be sortet/ordered in the outline view ==> a drag'n'drop ordering of sytles would be very nice (or maybe an alphabetical sorting)
UI/org.eclipse.birt.report.designer.ui.views/src/org/eclipse/birt/report/designer/internal/ui/views/outline/providers/ThemeNodeProvider.java
count = styleCount;
			count += theme.getAllCssStyleSheets( ).size( );
			Object obj[] = new Object[count];
			
			for(int i = 0; i < styleCount; i ++)
			{
				obj[i] = (super.getChildrenBySlotHandle( ( (ThemeHandle) model )
						.getStyles( )))[i];
			}
			
			for(int i = 0 ; i < theme.getAllCssStyleSheets( ).size( ); i ++)
			{
				obj[styleCount + i] = (CssStyleSheetHandle)theme.getAllCssStyleSheets( ).get( i );
			}
			return obj;
			
		}
		return super.getChildren( model );
	}
	private boolean canContain( Object object )
	{
		if ( object instanceof ThemeHandle )
		{
			return ( (ThemeHandle) object ).canContain(
					LibraryHandle.THEMES_SLOT,
					ReportDesignConstants.STYLE_ELEMENT );
		}
		return true;
	}
}