Index: ps/trunk/binaries/data/mods/public/gui/common/hotkeys.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/common/hotkeys.js	(revision 24855)
+++ ps/trunk/binaries/data/mods/public/gui/common/hotkeys.js	(revision 24856)
@@ -1,33 +1,36 @@
 /**
  * Holds a map of scancode name -> user keyboard name
  */
 var g_ScancodesMap;
 
 function hotkeySort(a, b)
 {
 	const specialKeys = ["Shift", "Alt", "Ctrl", "Super"];
 	// Quick hack to put those first.
 	if (specialKeys.indexOf(a) !== -1)
 		a = ' ' + a;
 	if (specialKeys.indexOf(b) !== -1)
 		b = ' ' + b;
 	return a.localeCompare(b, Engine.GetCurrentLocale().substr(0, 2), { "numeric": true });
 }
 
 function formatHotkeyCombination(comb, translateScancodes = true)
 {
 	if (!translateScancodes)
 		return comb.sort(hotkeySort).join("+");
 
 	if (!g_ScancodesMap)
 		g_ScancodesMap = Engine.GetScancodeKeyNames();
 
 	return comb.sort(hotkeySort).map(hk => g_ScancodesMap[hk]).join("+");
 }
 
 function formatHotkeyCombinations(combinations, translateScancodes = true)
 {
+	if (!combinations || !combinations.length)
+		return "";
+
 	let combs = combinations.map(x => formatHotkeyCombination(x, translateScancodes));
 	combs.sort((a, b) => a.length - b.length || a - b);
 	return translateScancodes ? combs.join(", ") : combs;
 }