Change MESS menu mode key

From Ninerpedia

The key to switch between Full Keyboard Mode and Partial Keyboard Mode is preset to Scroll Lock. If you want to map it to another key, simply define the uimodekey property in mess.ini.

Since version 0.141

...
#
# MESS SPECIFIC OPTIONS
#
ramsize
writeconfig               0
skip_gameinfo             1
natural                   0
uimodekey                 ENTER_PAD

This would change the menu key to the Enter key on the number keypad. You can choose any key from this set:

A, B, C, D, E, F, G, H, I,
J, K, L, M, N, O, P, Q, R, 
S, T, U, V, W, X, Y, Z, 0,
1, 2, 3, 4, 5, 6, 7, 8, 9,
F1, F2, F3, F4, F5, F6, F7, F8,
F9, F10, F11, F12, F13, F14, F15, ESC,
TILDE, MINUS, EQUALS, BACKSPACE, TAB, OPENBRACE, 
CLOSEBRACE, ENTER, COLON, QUOTE, BACKSLASH, BACKSLASH2,
COMMA, STOP, SLASH, SPACE, INSERT, DEL, HOME,
END, PGUP, PGDN, LEFT, RIGHT, UP, DOWN,
0_PAD, 1_PAD, 2_PAD, 3_PAD, 4_PAD, 5_PAD, 6_PAD,
7_PAD, 8_PAD, 9_PAD, SLASH_PAD, ASTERISK, MINUS_PAD,
PLUS_PAD, DEL_PAD, ENTER_PAD, PRTSCR, PAUSE, LSHIFT,
RSHIFT, LCONTROL, RCONTROL, LALT, RALT, SCRLOCK,
NUMLOCK, CAPSLOCK, LWIN, RWIN, MENU, CANCEL

Before version 0.141

Add ITEM_ID_ before the key name.

uimodekey                 ITEM_ID_ENTER_PAD