Bug 148551 [Import/Export] Import File System Problem
When going to import some files if you choose General, then Filesystem. As you browse to the folder where you want to import items from and select it, the option to "Select All" is not available until you either select the folder or a file in the folder.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardFileSystemResourceImportPage1.java
*	Creates an instance of this class
     */
    protected WizardFileSystemResourceImportPage1(String name,
            IWorkbench aWorkbench, IStructuredSelection selection) {
        super(name, selection);
    }
    /**
     *	Creates an instance of this class
     *
     * @param aWorkbench IWorkbench
     * @param selection IStructuredSelection
     */
    public WizardFileSystemResourceImportPage1(IWorkbench aWorkbench,
            IStructuredSelection selection) {
        this("fileSystemImportPage1", aWorkbench, selection);
        setTitle(DataTransferMessages.DataTransfer_fileSystemTitle);
        setDescription(DataTransferMessages.FileImport_importFileSystem);
    }
    /**
     * Creates a new button with the given id.
     * <p>
     * The <code>Dialog</code> implementation of this framework method
     * creates a standard push button, registers for selection events
     * including button presses and registers
     * default buttons with its shell.
     * The button id is stored as the buttons client data.
     * Note that the parent's layout is assumed to be a GridLayout and 
     * the number of columns in this layout is incremented.
     * Subclasses may override.
     * </p>