Calendar not visible on mobile

Hi,
Thanks for all your awesome plugins. The calendar in the media window for the new rendez-vous creation is not visible on a mobile screen. It doesn’t show the side widget in the media window because the screen size is to small. On a tablet it should work. I tried to make the media window scrollable from left to right with some custom css but is doesn’t work. I only can scroll up and down but not left/right. I am not really experienced enough with this. Can you make the media window scrollable somehow to make the calendar in the right widget visible on mobile?
Thanks so much!

https://wordpress.org/plugins/rendez-vous/