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
} else if (index == IDX_EDIT) {
				editEntry();
			} else if (index == IDX_REMOVE) {
				removeEntry();
			}
		}
	}
	private void editEntry() {
		List selElements= fFoldersList.getSelectedElements();
		if (selElements.size() != 1) {
			return;
		}
		Object elem= selElements.get(0);
		if (fFoldersList.getIndexOfElement(elem) != -1) {
			editElementEntry((CPListElement) elem);
		} else if (elem instanceof CPListElementAttribute) {
			editAttributeEntry((CPListElementAttribute) elem);
		}
	}
	private void editElementEntry(CPListElement elem) {
		CPListElement res= null;
		
		IResource resource= elem.getResource();
		if (resource.exists()) {
			CPListElement[] arr= openSourceContainerDialog(elem);
			if (arr != null) {
				res= arr[0];
			}
		} else {
			res= openNewSourceContainerDialog(elem);