Bug 51608 project creation wizard: add folder button lets one add existing folder the first time
M7 test pass, I200402102000 1. Create a new java project 2. configure using src and bin folders 3. on the second page, press "add folder" 4. enter "src" as the folder name into the mask -> there is no complaint about the added folder, although it already existed -> when pressing "add folder" a second time, a different dialog comes up, allowing to specify where to add a new folder. Entering an existing folder name here gets flagged as an error. -> it seems that although there is an entry for the preconfigured "src" folder, it does not yet exist really.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/JavaProjectWizardSecondPage.java
}
	
	/**
	 * Called from the wizard on finish.
	 */
	public void performFinish(IProgressMonitor monitor) throws CoreException, InterruptedException {
		try {
			monitor.beginTask(NewWizardMessages.getString("JavaProjectWizardSecondPage.operation.create"), 3); 
			if (fCurrProject == null) {
				updateProject(true, new SubProgressMonitor(monitor, 1));
			}
			configureJavaProject(new SubProgressMonitor(monitor, 2));
		} finally {
			monitor.done();
			fCurrProject= null;
		}
	}
	private void removeProject() {
		if (fCurrProject == null || !fCurrProject.exists()) {
			return;
		}
		
		IRunnableWithProgress op= new IRunnableWithProgress() {
			public void run(IProgressMonitor monitor) throws InvocationTargetException {
				final boolean noProgressMonitor= Platform.getInstanceLocation().equals(fCurrProjectLocation);
				if (monitor == null || noProgressMonitor) {
					monitor= new NullProgressMonitor();
				}
				monitor.beginTask(NewWizardMessages.getString("JavaProjectWizardSecondPage.operation.remove"), 3); 
				try {