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/SourceContainerWorkbookPage.java
int insertPos= Math.min(afterLastSourcePos, lastRemovePos);
			cpelements.addAll(insertPos, srcelements);
		}
		
		if (lastRemovePos != nEntries || !srcelements.isEmpty()) {
			fClassPathList.setElements(cpelements);
		}
	}
		
	private CPListElement openNewSourceContainerDialog(CPListElement existing, boolean includeLinked) {	
		if (includeLinked) {
			NewFolderDialog dialog= new NewFolderDialog(getShell(), fCurrJProject.getProject());
			dialog.setTitle(NewWizardMessages.getString("SourceContainerWorkbookPage.NewSourceFolderDialog.new.title")); 
			if (dialog.open() == Window.OK) {
				IResource createdFolder= (IResource) dialog.getResult()[0];
				return newCPSourceElement(createdFolder);
			}
			return null;
		} else {
			String title= (existing == null) ? NewWizardMessages.getString("SourceContainerWorkbookPage.NewSourceFolderDialog.new.title") : NewWizardMessages.getString("SourceContainerWorkbookPage.NewSourceFolderDialog.edit.title"); 
	
			IProject proj= fCurrJProject.getProject();
			NewSourceFolderDialog dialog= new NewSourceFolderDialog(getShell(), title, proj, getExistingContainers(existing), existing);
			dialog.setMessage(NewWizardMessages.getFormattedString("SourceContainerWorkbookPage.NewSourceFolderDialog.description", fProjPath.toString())); 
			if (dialog.open() == Window.OK) {
				IResource folder= dialog.getSourceFolder();
				return newCPSourceElement(folder);
			}
			return null;
		}