adding some keys to pp keyboard case, pageup, pagedown, f11, f12, maybe others

[zetabeta]

feature request:
add some keys or functions to pp keyboard case, especially, pageup, pagedown, f11, f12 and maybe others.

i notice some function keys are missing, i think those should be added.
pageup: fn+l
pagdown: fn+k
f11: fn+o
f12: fn+p
maybe some others not listed.

[TRS-80]

Emacs archaic keybindings and movement conventions used to be a joke, but now I am winning.