Allow editing of yaml files in the backend
The yaml file extension has to be added to the known textfile extensions in order to edit yaml files (ext:form...) in the backend.
[BUGFIX] Allow editing of yaml files in the backend
This adds the yaml file extension to the known textfile extensions for
the backend, so that i.e. form manifests are editable in the backend.
Reviewed-by: Mathias Brodala <email@example.com>
Tested-by: TYPO3com <firstname.lastname@example.org>
Reviewed-by: Stefan Neufeind <email@example.com>
Reviewed-by: Joerg Boesche <firstname.lastname@example.org>
Reviewed-by: Benni Mack <email@example.com>
Reviewed-by: Cedric Ziel <firstname.lastname@example.org>
Tested-by: Benni Mack <email@example.com>
Reviewed-by: Wouter Wolters <firstname.lastname@example.org>
Tested-by: Wouter Wolters <email@example.com>