Fix File\Version::getThumbnails
Fix File\Version::getThumbnails

Let's use the correct logic to determine if a thumbnail should exist

hissy/concrete5,triplei/concrete5-8,deek87/concrete5,MrKarlDilkington/concrete5,rikzuiderlicht/concrete5,haeflimi/concrete5,a3020/concrete5,biplobice/concrete5,mlocati/concrete5,olsgreen/concrete5,hissy/concrete5,concrete5/concrete5,triplei/concrete5-8,deek87/concrete5,haeflimi/concrete5,concrete5/concrete5,olsgreen/concrete5,mlocati/concrete5,haeflimi/concrete5,rikzuiderlicht/concrete5,hissy/concrete5,mlocati/concrete5,hissy/concrete5,triplei/concrete5-8,MrKarlDilkington/concrete5,biplobice/concrete5,haeflimi/concrete5,concrete5/concrete5,mainio/concrete5,mlocati/concrete5,MrKarlDilkington/concrete5,mainio/concrete5,olsgreen/concrete5,deek87/concrete5,biplobice/concrete5,jaromirdalecky/concrete5,biplobice/concrete5,rikzuiderlicht/concrete5,deek87/concrete5,jaromirdalecky/concrete5,jaromirdalecky/concrete5,mainio/concrete5,concrete5/concrete5,a3020/concrete5,jaromirdalecky/concrete5