Bug 65243 Build path dialog: Disable 'Add folder' when ex-/inclusion selected
RC1 On the build path dialog it would be better to disable 'Add folder' when ex-/inclusion selected to avoid confusion to what 'Add folder is releated'
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/LibrariesWorkbookPage.java
editEntry();
			return;
		case IDX_REMOVE: 
			removeEntry();
			return;			
		}
		if (libentries != null) {
			int nElementsChosen= libentries.length;					
			
			List cplist= fLibrariesList.getElements();
			List elementsToAdd= new ArrayList(nElementsChosen);
			
			for (int i= 0; i < nElementsChosen; i++) {
				CPListElement curr= libentries[i];
				if (!cplist.contains(curr) && !elementsToAdd.contains(curr)) {
					elementsToAdd.add(curr);
					curr.setAttribute(CPListElement.SOURCEATTACHMENT, BuildPathSupport.guessSourceAttachment(curr));
					curr.setAttribute(CPListElement.JAVADOC, JavaUI.getLibraryJavadocLocation(curr.getPath()));
				}
			}
			if (!elementsToAdd.isEmpty() && (index == IDX_ADDFOL)) {
				askForAddingExclusionPatternsDialog(elementsToAdd);
			}
			
			fLibrariesList.addElements(elementsToAdd);
			if (index == IDX_ADDLIB) {
				fLibrariesList.refresh();
			}
			fLibrariesList.postSetSelection(new StructuredSelection(libentries));
		}