Hello everyone,
I would like to report that everytime i use the property matrix and i try to change a property to many (by many i mean thousands ) sprites Unreal always hangs and the Task manager reports it as “Not responding” .Today i tried to change 6000+ sprites default material at once and although the system eventually managed to pull it through without a crash i had no visual indication that it was working hard for me (progress bar ) and the whole time it was marked by the OS as not responding.This can be misleading and many people will probably just kill the process since they will think that Unreal is stuck.
i will not tolerate such bad behaviour from my favorite game engine! 
Please add a progress bar so we know that everything is working as intended.
Thank you!