Bug 139409 Properties file with multi-catalog
Details: Properties file with multi-catalog Step: 1. Set the resource folder as c:/source 2. Create a folder in resource folder: c:/source/properties/ 3. New a report design and create a properties in c:/source/properties/ 4. Add a label ans switch to Locatization, press ... 5. Add a key and value. Actual result: It said that the properties file is read-only and I can not add some key.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/ResourceEditDialog.java
{
		private boolean descent;
		private boolean second;
		/**
		 * The constructor.
		 * 
		 * @param descent
		 *            sorting order.
		 * @param second
		 *            if it's the second column.
		 */
		public ResourceSorter( boolean descent, boolean second )
		{
			super( );
			this.descent = descent;
			this.second = second;
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.viewers.ViewerSorter#compare(org.eclipse.jface.viewers.Viewer,
		 *      java.lang.Object, java.lang.Object)
		 */
		public int compare( Viewer viewer, Object e1, Object e2 )
		{
			String name1;
			String name2;
			if ( viewer == null || !( viewer instanceof ContentViewer ) )