Bug 17826 [Wizards] New folder wizard is very large if you are creating the folder in a container with a very long path
F1 1) Create a folder with a very long name 2) Select the folder and open the new folder wizard, it is very wide. Similar with new file The Java creation wizards do not have this problem.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/misc/ResourceAndContainerGroup.java
* @param e org.eclipse.swt.widgets.Event
     */
    public void handleEvent(Event e) {
        validateControls();
        if (client != null) {
            client.handleEvent(e);
        }
    }
    /**
     * Sets the flag indicating whether existing resources are permitted.
     */
    public void setAllowExistingResources(boolean value) {
        allowExistingResources = value;
    }
    /**
     * Sets the value of this page's container.
     *
     * @param path Full path to the container.
     */
    public void setContainerFullPath(IPath path) {
        IResource initial = ResourcesPlugin.getWorkspace().getRoot()
                .findMember(path);
        if (initial != null) {
            if (!(initial instanceof IContainer)) {
                initial = initial.getParent();
            }
            containerGroup.setSelectedContainer((IContainer) initial);
        }
        validateControls();
    }