* Upgraded Nextcloud from 13.0.6 to 14.0.6.
* Upgraded Contacts from 2.1.5 to 2.1.8.
* Upgraded Calendar from 1.6.1 to 1.6.4.
* Cleanup unsupported version upgrades: Since an upgrade to v0.30 is mandatory before moving upward, I removed the checks for Nextcloud prior version 12.
* Fix the storage root path.
* Add missing indices. Thx @yodax for your feedback.
