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
* file system object merits one.  The criteria for this are:
     * Also create the children.
     */
    protected MinimizedFileSystemElement createRootElement(
            Object fileSystemObject, IImportStructureProvider provider) {
        boolean isContainer = provider.isFolder(fileSystemObject);
        String elementLabel = provider.getLabel(fileSystemObject);
        
        
        MinimizedFileSystemElement dummyParent = new MinimizedFileSystemElement(
                "", null, true);
        dummyParent.setPopulated();
        MinimizedFileSystemElement result = new MinimizedFileSystemElement(
                elementLabel, dummyParent, isContainer);
        result.setFileSystemObject(fileSystemObject);
        
        result.getFiles(provider);
        return dummyParent;
    }
    /**
     *	Create the import source specification widgets
     */
    protected void createSourceGroup(Composite parent) {
        createRootDirectoryGroup(parent);
        createFileSelectionGroup(parent);
        createButtonsGroup(parent);
    }
    /**
     * Enable or disable the button group.
     */