more cmdhelp

Some number_pad handling which wasn't present in the original cmdhelp
but is acted upon in cmd.c.

dat/cmdhelp

@@ -157,6 +157,7 @@ $	Count your gold
 0	Show inventory
 4	Move west
 6	Move east
+-	'F' prefix; force fight
 &: #-1,0
 0	Continue a count
 4	Start or continue a count
@@ -186,8 +187,11 @@ $	Count your gold
 &. #1,2 vs 3,4 vs -1,0
 &? number_pad=1,3
 5	'g' movement prefix
+M-5	'G' movement prefix
 &: number_pad=2,4
 5	'G' movement prefix
+M-5	'g' movement prefix
+M-0	Inventory specific item types
 &: #-1,0
 5	Start or continue a count
 M-2	Toggle two-weapon combat