Steps to reproduce: 
1) Select all unstaged files 
2) Press "..." button and choose "Discard file"
3) Confirm that you want to "discard all your changes to the selected files"? in the popup

Expected result: 
All selected files are discarded.

Actual result: 
Only one file is discarded. Only the file that "..." button was pressed next to. 

Same behavior happens for stage multiple and remove multiple if action happening via pressing "..." button next to one of the files.