Allow selection through keypress, in "Destination space" dropdown, while moving threads

1) Select a thread
2) Click on move
3) The page that comes up has a dropdown for "Destination Space". This dropdown has numerous spaces. If someone wants to "jump" the selection to a particular space, usually he would use the keyboard to type the starting letter of the space. However, this dropdown doesn't allow this. The user currently has to scroll through the list to select the correct space.

It would be nice to allow using the keyboard, to jump the selection to a specific space.