Ticket #157 (closed enhancement: fixed)

Currently, input line history selection ([123]) is activated using the up and down arrow keys (because we customized the handling of the moveUp: and moveDown: command selectors on the text field's text view). I end up selecting another line history entry a lot of times when all I wanted was simply to edit a multiline string that I was typing at the moment. We should probably switch the key-bindings for the input line history selection to also require some modifier key. For example, we could use option-up_arrow and option-down_arrow instead. (Or some other modifier. Preferably, one of the modifiers that is rarely used while editing textfields)