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
* Added here so that inner classes can have access
     */
    protected void handleTypesEditButtonPressed() {
        super.handleTypesEditButtonPressed();
    }
    /**
     *  Import the resources with extensions as specified by the user
     */
    protected boolean importResources(List fileSystemObjects) {
        ImportOperation operation = new ImportOperation(getContainerFullPath(),
                getSourceDirectory(), FileSystemStructureProvider.INSTANCE,
                this, fileSystemObjects);
        operation.setContext(getShell());
        return executeImportOperation(operation);
    }
    /**
     * Initializes the specified operation appropriately.
     */
    protected void initializeOperation(ImportOperation op) {
        op.setCreateContainerStructure(createContainerStructureButton
                .getSelection());
        op.setOverwriteResources(overwriteExistingResourcesCheckbox
                .getSelection());
    }
    /**
     * Returns whether the extension provided is an extension that
     * has been specified for export by the user.
     *
     * @param extension the resource name
     * @return <code>true</code> if the resource name is suitable for export based