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
else
			return newList;
	}
	private Set getExportedNonContainers() {
		Set whiteCheckedTreeItems= fInputGroup.getWhiteCheckedTreeItems();
		Set exportedNonContainers= new HashSet(whiteCheckedTreeItems.size());
		Set javaElementResources= getCorrespondingContainers(whiteCheckedTreeItems);
		Iterator iter= fInputGroup.getAllCheckedListItems();
		while (iter.hasNext()) {
			Object element= iter.next();
			Object parent= null;
			if (element instanceof IResource)
				parent= ((IResource)element).getParent();
			else if (element instanceof IJavaElement)
				parent= ((IJavaElement)element).getParent();
			if (!whiteCheckedTreeItems.contains(parent) && !javaElementResources.contains(parent))
				exportedNonContainers.add(element);
		}
		return exportedNonContainers;
	}
	/*
	 * Create a list with the folders / projects that correspond
	 * to the Java elements (Java project, package, package root)
	 */
	private Set getCorrespondingContainers(Set elements) {
		Set javaElementResources= new HashSet(elements.size());
		Iterator iter= elements.iterator();
		while (iter.hasNext()) {
			Object element= iter.next();
			if (element instanceof IJavaElement) {