Why did you remove the select all option when in the inbox or sent mail?

There used to be an option to select all when in the inbox or sent mail, so they would all be checked and you could just uncheck the ones you don't want to delete.  Now that  disappeared and when I hit the all, it only shows delete all, mark as read, or move.  The select all is no where to be seen.  I now have to check each email manually, so I don't delete the ones I want to keep.  This seems rather redundant and makes no sense why this option was removed. It only works on my phone, but not on my laptop or desktop.  Please bring this button back.