eating, drinking via #herecmdmenu

Fix eat floor food and drink from dungeon feature via #herecmdmenu.
That uses queued commands, but those two actions were changed to
skip the floor when queued input was present because asking about
floor items interfered with context-sensitive inventory item-actions.

I was misled by a comment that says it couldn't insert an m-prefix;
that was for treating the 'm' key as typed text rather than as a
command.  There's no problem with inserting a #reqmenu command which
is what 'm' is these days.  So item actions can force 'm' to skip the
floor and go directly to inventory, also the #eat and #quaff commands
don't have to alter their behavior when queued input is pending so
the #herecmdmenu usage for them gets fixed.

src/eat.c

@@ -3437,9 +3437,8 @@ floorfood(
                       * floor food has been declined and inventory lacks
                       * any suitable items */
     /* if we can't touch floor objects then use invent food only;
-       same if 'm' prefix was used or we're executing an item action
-       for context-sensitive inventory */
-    if (iflags.menu_requested || cmdq_peek()
+       same when 'm' prefix is used--for #eat, it means "skip floor food" */
+    if (iflags.menu_requested
         || !can_reach_floor(TRUE) || (feeding && u.usteed)
         || (is_pool_or_lava(u.ux, u.uy)
             && (Wwalking || is_clinger(uptr) || (Flying && !Breathless))))