Bug 119331 Library - name space terminology and behavior
During BIRT 2.0 library feature review meeting the following change was decided. - Change the term namespace to 'prefix' - By default use the library name as the prefix ( namespace ); the dialog to input prefix should be prompted only if hte auto generated prefix is not unique.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
for ( int i = 0; i < pjs.length; i++ )
		{
			if ( pjs[i].isAccessible( ) )
			{
				return pjs[i];
			}
		}
		return null;
	}
	/**
	 * Returns the default shell used by dialogs
	 * 
	 * @return the active shell of the current display
	 */
	public static Shell getDefaultShell( )
	{
		Shell shell = null;
		try
		{
			shell = PlatformUI.getWorkbench( ).getDisplay( ).getActiveShell( );
			if ( shell == null )
			{
				shell = Display.getCurrent( ).getActiveShell( );
			}
			if ( shell == null )
			{
				shell = PlatformUI.getWorkbench( )
						.getActiveWorkbenchWindow( )
						.getShell( );
			}