sort categories by title

See merge request riconet-public/typo3/rico_fairs!14

Fix/qa

See merge request riconet-public/typo3/rico_fairs!15

Update composer.json

See merge request riconet-public/typo3/rico_fairs!13

Add more order details in emails

See merge request riconet-public/typo3/rico_fairs!12

* Add fair start and end date in positions
* Update email parsing to enable order details
* Fix url generating backend view helpers
* Fix some code styles

Fix wrong code in ext_localconf.php and ext_tables.php.

See merge request riconet-public/typo3/rico_fairs!11

Add support for TYPO3 8.7.

See merge request riconet/typo3/extensions/rico_fairs!4

* Add composer support.
* Add test and CI support.
* Fix some file content issues.
* Add plugin utility.
* Move some methods calls from ext_localconf.php and ext_tables.php
  to their respective place.

Fix CategoryRepository::findByParent.

See merge request riconet/rico_fairs!2

Fix some bugs with appointments.

Sort by sorting in list view.

Change link in OptIn Eid.

Add empty fair handling in showAction to default-TYPO3 404 handler

Fix some bugs.
Add new icons.
Fix some more bugs.

Update FairRepository.php

See merge request !1

Changed category constraint to logicalOr and contains instead of in, because the query treid to find categories.uid, where the count of related categories is saved, not the uid itself.

Updates setOriginalResource to be compatible with TYPO3\CMS\Extbase\Domain\Model\FileReference::setOriginalResource