Bug 19145 [Wizards] Make wizards resizable and keep bounds
Both the Checkbox Tree and the Checkbox List have horizontal scrollbars because mose package names and type names don't fit in the default size. It would be nice to be able to size this dialog bigger, and have it have a wider default size (I assume it is sized for 640x480? but is could be wider).
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/JarPackageWizardPage.java
public void run() {
					setupBasedOnInitialSelections();
				}
			});
		setControl(composite);
		update();
		giveFocusToDestination();
		
		WorkbenchHelp.setHelp(composite, IJavaHelpContextIds.JARPACKAGER_WIZARD_PAGE);
	}
	/**
	 *	Create the export options specification widgets.
	 *
	 *	@param parent org.eclipse.swt.widgets.Composite
	 */
	protected void createOptionsGroup(Composite parent) {
		Composite optionsGroup= new Composite(parent, SWT.NONE);
		GridLayout layout= new GridLayout();
		layout.marginHeight= 0;
		optionsGroup.setLayout(layout);
		fCompressCheckbox= new Button(optionsGroup, SWT.CHECK | SWT.LEFT);
		fCompressCheckbox.setText(JarPackagerMessages.getString("JarPackageWizardPage.compress.text")); 
		fCompressCheckbox.addListener(SWT.Selection, this);
		fOverwriteCheckbox= new Button(optionsGroup, SWT.CHECK | SWT.LEFT);
		fOverwriteCheckbox.setText(JarPackagerMessages.getString("JarPackageWizardPage.overwrite.text")); 
		fOverwriteCheckbox.addListener(SWT.Selection, this);
	}
	/**
	 *	Answer the contents of the destination specification widget. If this
	 *	value does not have the required suffix then add it first.