Description: dsconf tool now has:
'dsconf localhost backup create' and 'dsconf localhost backup restore';
'dsconf localhost backend import' and 'dsconf localhost backend export'.
Add basic tests for the CLI part
Add JS logic for online backup/restore.
Add more HTML and JS for online import/export functionality.
Fix CSS alignment issues. Fix validity checks in CLI.

https://pagure.io/389-ds-base/issue/49858

Reviewed by: mreynolds, wibrown, mhonek (Thanks!)