Bug 8476 JAR Packager: Make main class field editable
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/JarManifestWizardPage.java
update();
		WorkbenchHelp.setHelp(composite, new DialogPageContextComputer(this, IJavaHelpContextIds.JARMANIFEST_WIZARD_PAGE));								
			
	}
	/**
	 *	Create the export options specification widgets.
	 *
	 *	@param parent org.eclipse.swt.widgets.Composite
	 */
	protected void createManifestGroup(Composite parent) {
		fManifestGroup= new Composite(parent, SWT.NONE);
		GridLayout layout= new GridLayout();
		fManifestGroup.setLayout(layout);		
		fManifestGroup.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL));
		fGenerateManifestRadioButton= new Button(fManifestGroup, SWT.RADIO | SWT.LEFT);
		fGenerateManifestRadioButton.setText(JarPackagerMessages.getString("JarManifestWizardPage.genetateManifest.text")); 
		fGenerateManifestRadioButton.addListener(SWT.Selection, fUntypedListener);
			Composite saveOptions= new Composite(fManifestGroup, SWT.NONE);
			GridLayout saveOptionsLayout= new GridLayout();
			saveOptionsLayout.marginWidth= 0;
			saveOptions.setLayout(saveOptionsLayout);
			GridData data= new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL);
			data.horizontalIndent=20;
			saveOptions.setLayoutData(data);
	
			fSaveManifestCheckbox= new Button(saveOptions, SWT.CHECK | SWT.LEFT);
			fSaveManifestCheckbox.setText(JarPackagerMessages.getString("JarManifestWizardPage.saveManifest.text")); 
			fSaveManifestCheckbox.addListener(SWT.MouseUp, fUntypedListener);
	
			fReuseManifestCheckbox= new Button(saveOptions, SWT.CHECK | SWT.LEFT);