Bug 151361 default value for reousrce folder user preference
When user does not sepecify the resourec foler user preference, can we make the current project folder (in IDE) or the current report design file's folder (in RCP) as the default value for the resource folder. This way, by default the current project folder is the resource folder where user can create their libs and images. Also please set the default user preference to be null when BIRT is freshly installed.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/ReportPlugin.java
{
		return ResourcesPlugin.getWorkspace( );
	}
	/**
	 * Set default element names for preference
	 * 
	 * @param store
	 *            The preference for store
	 */
	private void setDefaultElementNamePreference( IPreferenceStore store )
	{
		List tmpList = DesignEngine.getMetaDataDictionary( ).getElements( );
		int i;
		StringBuffer bufferDefaultName = new StringBuffer( );
		StringBuffer bufferCustomName = new StringBuffer( );
		StringBuffer bufferPreference = new StringBuffer( );
		int nameOption;
		IElementDefn elementDefn;
		for ( i = 0; i < tmpList.size( ); i++ )
		{
			elementDefn = (IElementDefn) ( tmpList.get( i ) );
			nameOption = elementDefn.getNameOption( );
			
			if ( nameOption == MetaDataConstants.NO_NAME
					|| filteName( elementDefn ) )
			{
				continue;
			}
			nameCount++;
			bufferDefaultName.append( elementDefn.getName( ) );