Bug 214443 [Markers] Problem view filter created even if I hit Escape
3.0M4 If I Configure Contents in the Problems view and push the New button to create a Filter, hitting Cancel in the input dialog still creates a filter.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/FiltersConfigurationDialog.java
GridLayout buttonLayout = new GridLayout();
		buttonLayout.marginWidth = 0;
		buttons.setLayout(buttonLayout);
		GridData buttonsData = new GridData();
		buttonsData.verticalAlignment = GridData.BEGINNING;
		buttons.setLayoutData(buttonsData);
		Button addNew = new Button(buttons, SWT.PUSH);
		addNew.setText(MarkerMessages.MarkerFilter_addFilterName);
		addNew.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				InputDialog newDialog = new InputDialog(getShell(),
						MarkerMessages.MarkerFilterDialog_title,
						MarkerMessages.MarkerFilterDialog_message,
						MarkerMessages.MarkerFilter_newFilterName,
						new IInputValidator() {
							/*
							 * (non-Javadoc)
							 * 
							 * @see org.eclipse.jface.dialogs.IInputValidator#isValid(java.lang.String)
							 */
							public String isValid(String newText) {
								if (newText.length() == 0)
									return MarkerMessages.MarkerFilterDialog_emptyMessage;
								Iterator filterIterator = filterGroups
										.iterator();
								while (filterIterator.hasNext()) {
									if (((MarkerFieldFilterGroup) filterIterator
											.next()).getName().equals(newText))
										return NLS
												.bind(