Add common next/prev line keys about pathpicker

[pcottle]

From looking around the web, it looks like curses cant determine if modifier keys are set:
http://stackoverflow.com/questions/4684739/how-to-get-shiftx-altx-keys-in-curses/9775675#9775675
http://stackoverflow.com/questions/9061111/ncurses-with-arrow-keys-plus-modifiers

Since they aren't event sent to the terminal :-/ otherwise id love to add this and add other support for all sorts of modifiers

(seems there is some third party library that attempts to do this but im hesitant to pull it in)

[pcottle]

(wish we had a cantfix label, was looking for that one)

[mstorus]

Would it be sufficient to listen for the Shift Out and Data Link Escape control codes?
Even if you can't tell if a modifier key was set, pressing Ctrl-n and Ctrl-p seem to produce those control codes, respectively. (codes 14 and 16 http://en.wikipedia.org/wiki/ASCII#ASCII_control_characters)

I'm not very familiar with curses, so I don't know how portable this solution is.

[pcottle]

yeah i dont think its an issue with what the control codes are, but rather the fact that the terminal / curses doesnt receive them at all. only exceptions are situations like tmux which gets all the keypresses, but then tmux doesnt pipe them into the running terminal :P

if you can get a working version in curses then id be down to implement (and we should update all those stack overflow answers haha) but keeping this closed for now