more precise control over menu order

I can't believe I didn't notice this until now.

counter.tlv

@@ -37,7 +37,9 @@
   __teliva_note: foo
 - __teliva_timestamp: original
   menu:
-    >menu = {Enter="increment"}
+    >menu = {
+    >  {"Enter", "increment"}
+    >}
 - __teliva_timestamp: original
   update:
     >function update(window)

gemini.tlv

@@ -234,11 +234,12 @@
     >end
 - __teliva_timestamp: original
   menu:
-    >menu = {}
-    >menu['enter'] = 'go to highlight'
-    >menu['←'] = 'back'
-    >menu['^g'] = 'enter url'
-    >menu['^u'] = 'view source'
+    >menu = {
+    >  {'Enter', 'go to highlight'},
+    >  {'<-', 'back'},
+    >  {'^g', 'enter url'},
+    >  {'^u', 'view source'},
+    >}
 - __teliva_timestamp: original
   edit_line:
     >function edit_line(window)

life.tlv

@@ -194,7 +194,7 @@
     >end
 - __teliva_timestamp: original
   update:
-    >menu = {arrow="pan"}
+    >menu = {{"arrow", "pan"}}
     >
     >function update(window, c)
     >  if c == curses.KEY_LEFT then

src/menu.c

@@ -2,6 +2,7 @@
 #include <string.h>
 
 #include "lua.h"
+#include "lauxlib.h"
 #include "teliva.h"
 
 
@@ -32,9 +33,16 @@ void draw_menu (lua_State *L) {
   /* render any app-specific items */
   lua_getglobal(L, "menu");
   int table = lua_gettop(L);
-  if (lua_istable(L, -1))
-    for (lua_pushnil(L); lua_next(L, table) != 0; lua_pop(L, 1))
+  if (lua_istable(L, -1)) {
+    for (int i = 1; i <= luaL_getn(L, table); ++i) {
+      lua_rawgeti(L, table, i);
+      int menu_item = lua_gettop(L);
+      lua_rawgeti(L, menu_item, 1);  /* key */
+      lua_rawgeti(L, menu_item, 2);  /* value */
       draw_menu_item(lua_tostring(L, -2), lua_tostring(L, -1));
+      lua_pop(L, 3);
+    }
+  }
 
   lua_pop(L, 1);
   attrset(A_NORMAL);

template.tlv

@@ -165,6 +165,8 @@
     >end
 - __teliva_timestamp: original
   menu:
+    >-- To show app-specific hotkeys in the menu bar, add hotkey/command
+    >-- arrays of strings to the menu array.
     >menu = {}
 - __teliva_timestamp: original
   update:

toot-toot.tlv

@@ -165,9 +165,10 @@
     >end
 - __teliva_timestamp: original
   menu:
-    >menu = {}
-    >menu['^u'] = 'clear'
-    >menu['^w'] = "write prose to file 'toot' (edit does NOT save)"
+    >menu = {
+    >  {'^u', 'clear'},
+    >  {'^w', 'write prose to file "toot" (edit hotkey does NOT save)'},
+    >}
 - __teliva_timestamp: original
   update:
     >function update(window)