Bug 64419 Tomcat example does not need "web app root" attribute
The Tomcat/JSP launching example currently requires the user specify a "web app root" on the main tab. However, all we need is the project (in order to compute a classpath for extra java files and source lookup path). We used to require the attribute for source lookup.
org.eclipse.jdt.ui.examples.javafamily/src/org/eclipse/jsp/launching/TomcatTab.java
* @see org.eclipse.debug.ui.ILaunchConfigurationTab#createControl(Composite)
	 */
	public void createControl(Composite parent) {
		
		Font font = parent.getFont();
				
		Composite composite = new Composite(parent, SWT.NONE);		
		GridLayout workingDirLayout = new GridLayout();
		workingDirLayout.numColumns = 3;
		workingDirLayout.marginHeight = 0;
		workingDirLayout.marginWidth = 0;
		composite.setLayout(workingDirLayout);
		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
		composite.setLayoutData(gd);
		composite.setFont(font);
		setControl(composite);
		
		createVerticalSpacer(composite, 3);
				
		Label label = new Label(composite, SWT.NONE);
		label.setText(LaunchingMessages.getString("TomcatTab.3")); 
		gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
		gd.horizontalSpan = 3;
		label.setLayoutData(gd);
		label.setFont(font);
				
		fTomcatDir = new Text(composite, SWT.SINGLE | SWT.BORDER);
		gd = new GridData(GridData.FILL_HORIZONTAL);
		gd.horizontalSpan = 2;
		fTomcatDir.setLayoutData(gd);