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
protected void updateSelections(Map map) {
        super.updateSelections(map);
    }
    /**
     * Check if widgets are enabled or disabled by a change in the dialog.
     * Provided here to give access to inner classes.
     */
    protected void updateWidgetEnablements() {
        super.updateWidgetEnablements();
    }
    /**
     *	Answer a boolean indicating whether self's source specification
     *	widgets currently all contain valid values.
     */
    protected boolean validateSourceGroup() {
        File sourceDirectory = getSourceDirectory();
        if (sourceDirectory == null) {
            setMessage(SOURCE_EMPTY_MESSAGE);
            enableButtonGroup(false);
            return false;
        }
        if (sourceConflictsWithDestination(new Path(sourceDirectory.getPath()))) {
            setErrorMessage(getSourceConflictMessage());
            enableButtonGroup(false);
            return false;
        }
        List resourcesToExport = selectionGroup.getAllWhiteCheckedItems();
        if (resourcesToExport.size() == 0){
        	setErrorMessage(DataTransferMessages.FileImport_noneSelected);
        	return false;