Changes since tag 1.1.0

commit 3688a921ac14e4e904a9d265eec3d6da60ee855a
Author: Rainrider <Rainrider@users.noreply.github.com>
Date:   Wed Jun 19 10:34:08 2019 +0200

    Save the event units in lowercase

commit 37c6f64616dc8c3b2a02a9b972fe8732209d9974
Author: Rainrider <Rainrider@users.noreply.github.com>
Date:   Tue Jun 18 12:20:14 2019 +0200

    Add event name and units validation to the GUI

