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/SourceContainerWorkbookPage.java
String[] buttonLabels;
		buttonLabels= new String[] { 
			 NewWizardMessages.getString("SourceContainerWorkbookPage.folders.add.button"), 
			 null,
			 NewWizardMessages.getString("SourceContainerWorkbookPage.folders.edit.button"), 
			 NewWizardMessages.getString("SourceContainerWorkbookPage.folders.remove.button") 
		};
		
		fFoldersList= new TreeListDialogField(adapter, buttonLabels, new CPListLabelProvider());
		fFoldersList.setDialogFieldListener(adapter);
		fFoldersList.setLabelText(NewWizardMessages.getString("SourceContainerWorkbookPage.folders.label")); 
		
		fFoldersList.setViewerSorter(new CPListElementSorter());
		fFoldersList.enableButton(IDX_EDIT, false);
		
		fUseFolderOutputs= new SelectionButtonDialogField(SWT.CHECK);
		fUseFolderOutputs.setSelection(false);
		fUseFolderOutputs.setLabelText(NewWizardMessages.getString("SourceContainerWorkbookPage.folders.check"));
		fUseFolderOutputs.setDialogFieldListener(adapter);
	}
	
	public void init(IJavaProject jproject) {
		fCurrJProject= jproject;
		fProjPath= fCurrJProject.getProject().getFullPath();	
		updateFoldersList();
	}
	
	private void updateFoldersList() {	
		ArrayList folders= new ArrayList();