Also I just found that xterm sends slightly different codes for Shift+F1...F4, so this myxterm.ti is also for xterm:
xterm|X11 terminal emulator with correct kf-sequences, kf13=\EO1;2P, kf14=\EO1;2Q, kf15=\EO1;2R, kf16=\EO1;2S, kf13=\E[1;2P, kf14=\E[1;2Q, kf15=\E[1;2R, kf16=\E[1;2S, use=xterm-xf86-v44,
However Shift+F2 acts as Shift+F4 (in mc) in xterm too.
Also I just found that xterm sends slightly different codes for Shift+F1...F4, so this myxterm.ti is also for xterm:
xterm|X11 terminal emulator with correct kf-sequences, xf86-v44,
kf13=\EO1;2P,
kf14=\EO1;2Q,
kf15=\EO1;2R,
kf16=\EO1;2S,
kf13=\E[1;2P,
kf14=\E[1;2Q,
kf15=\E[1;2R,
kf16=\E[1;2S,
use=xterm-
However Shift+F2 acts as Shift+F4 (in mc) in xterm too.