Added a single line
"To drop x items, type a number and then the item hotkey."
To the multidrop screen.
Fixed the small output error when carving or cutting up an objects with a knife resulted in no result.
Merge pull request #6063 from Soyweiser/Carving_Outputstring

Fixed the small issue where carving/cutting with a bladed object could result in no objects, but a 0 chunks string.
Merge branch 'GUI_Dropping' of https://github.com/Soyweiser/Cataclysm-DDA into Soyweiser-GUI_Dropping
Merge branch 'master' of https://github.com/CleverRaven/Cataclysm-DDA