Bug 30727 exclusion filters: cannot remove [build path]
20030129 create a jproject and a src folder in it add 2 packages to it a.b and c.d exclude c/d/ from the classpath open the java build path dialog, select the source folders expand the tree node select 'Exclusion filter: /c/d/' press 'Remove' seems to be removed, right? wrong. open the dialog again - the filter for /c/d is still there
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/LibrariesWorkbookPage.java
private static final String DIALOGSTORE_ADV_SECTION= "LibrariesWorkbookPage.advanced"; 
		private static final String DIALOGSTORE_SELECTED= "selected"; 
		private static final String DIALOGSTORE_CONTAINER_IDX= "containerindex"; 
		private DialogField fLabelField;
		private SelectionButtonDialogField fCreateFolderField;
		private SelectionButtonDialogField fAddFolderField;
		private SelectionButtonDialogField fAddContainerField;
		private ComboDialogField fCombo;
		private CPListElement[] fResult;
		
		private IDialogSettings fAdvSettings;
		
		private ClasspathContainerDescriptor[] fDescriptors;
		public AdvancedDialog(Shell parent) {
			super(parent);
			
			fAdvSettings= fDialogSettings.getSection(DIALOGSTORE_ADV_SECTION);
			if (fAdvSettings == null) {
				fAdvSettings= fDialogSettings.addNewSection(DIALOGSTORE_ADV_SECTION);
				fAdvSettings.put(DIALOGSTORE_SELECTED, 2); 
				fAdvSettings.put(DIALOGSTORE_CONTAINER_IDX, 0);
			}		
			
			fDescriptors= ClasspathContainerDescriptor.getDescriptors();
			
			fLabelField= new DialogField();
			fLabelField.setLabelText(NewWizardMessages.getString("LibrariesWorkbookPage.AdvancedDialog.description"));