Move *RetoucheFly* into properties container

Change-Id: I07c1751848c55c12bad16735b7f83ea07b150080
Reviewed-on: https://gerrit.libreoffice.org/12484
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>