Bug 55249 [Wizards] Radio button looses selection when page is disabled
20040318 1. Open the new Java project wizard, enter a name 2. In the 'project layout' group, set the upper radio button 3. press 'next', the 'prev' 4. The radio has changed to the lower control This doesn't happen on the MAC
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/JavaProjectWizardFirstPage.java
String name= getProjectName();
				if (name.length() == 0 || JavaPlugin.getWorkspace().getRoot().findMember(name) != null) {
					fDetect= false;
				} else {
					final File directory= fLocationGroup.getLocation().append(getProjectName()).toFile();
					fDetect= directory.isDirectory();
				}
			} else {
				final File directory= fLocationGroup.getLocation().toFile();
				fDetect= directory.isDirectory();
			}
			fText.setVisible(fDetect);
			setChanged();
			notifyObservers();
		}
		
		public boolean mustDetect() {
			return fDetect;
		}
	}
	/**
	 * Validate this page and show appropriate warnings and error NewWizardMessages.
	 */
	private final class Validator implements Observer {
		public void update(Observable o, Object arg) {
			final IWorkspace workspace= JavaPlugin.getWorkspace();
			final String name= fNameGroup.getName();
			
			if (name.length() == 0) { 
				setErrorMessage(null);