Bug 38483 Delete: buttons on the 'Found Problems' page [refactoring]
20030604 1. make Java file read-only and delete a method in it 2. On the first dialog, press ok, a 'Found Problems' dialog shows up 3. The dialog has two buttons: Back and cancel Back is not too helpfull as you can't change anything on the first dialog Cancel should probably be better 'Ok'
org.eclipse.ltk.ui.refactoring/src/org/eclipse/ltk/ui/refactoring/RefactoringWizard.java
*/
	public IWizardPage getPreviousPage(IWizardPage page) {
		if (hasUserInput())
			return super.getPreviousPage(page);
		if (! page.getName().equals(ErrorWizardPage.PAGE_NAME)){
			if (fConditionCheckingStatus.isOK())
				return null;
		}		
		return super.getPreviousPage(page);		
	}
	 IWizardPage computeUserInputSuccessorPage(IWizardPage caller, IRunnableContext context) {
		Change change= createChange(new CreateChangeOperation(
			new CheckConditionsOperation(fRefactoring, CheckConditionsOperation.FINAL_CONDITIONS),
			RefactoringStatus.FATAL), true, context);
		
		RefactoringStatus status= getConditionCheckingStatus();
		
		
		if (change == null && status == null) {		
			internalSetChange(InternalAPI.INSTANCE, change);
			return caller;
		}
				
		
		if (!status.hasFatalError())
			internalSetChange(InternalAPI.INSTANCE, change);
		
		if (status.isOK()) {
			return getPage(IPreviewWizardPage.PAGE_NAME);
		} else {