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
*   upon its extension
     */
    protected boolean isExportableExtension(String extension) {
        if (selectedTypes == null) {
			return true;
		}
        Iterator itr = selectedTypes.iterator();
        while (itr.hasNext()) {
            if (extension.equalsIgnoreCase((String) itr.next())) {
				return true;
			}
        }
        return false;
    }
    /**
     *	Repopulate the view based on the currently entered directory.
     */
    protected void resetSelection() {
        MinimizedFileSystemElement currentRoot = getFileSystemTree();
        this.selectionGroup.setRoot(currentRoot);
    }
    /**
     *	Use the dialog store to restore widget values to the values that they held
     *	last time this wizard was used to completion
     */
    protected void restoreWidgetValues() {
        IDialogSettings settings = getDialogSettings();
        if (settings != null) {
            String[] sourceNames = settings.getArray(STORE_SOURCE_NAMES_ID);
            if (sourceNames == null) {