Fix assumption that modifiers is always a set. (#7488)
Fix assumption that modifiers is always a set. (#7488)


akshayaurora/kivy,matham/kivy,rnixx/kivy,kivy/kivy,matham/kivy,rnixx/kivy,kivy/kivy,akshayaurora/kivy,akshayaurora/kivy,kivy/kivy,matham/kivy,matham/kivy,rnixx/kivy