Windows: Hide accelerators when they are disabled.

Currently, mapping something to load state / save state / etc. causes the
default accelerators to become disabled.  In this case, it can be
confusing when the menu still shows them.

Fixes #11395.

Common/KeyMap.cpp

@@ -44,6 +44,7 @@ struct DefMappingStruct {
 };
 
 KeyMapping g_controllerMap;
+int g_controllerMapGeneration = 0;
 std::set<std::string> g_seenPads;
 
 bool g_swapped_keys = false;
@@ -833,6 +834,7 @@ void SetKeyMapping(int btn, KeyDef key, bool replace) {
 		}
 		g_controllerMap[btn].push_back(key);
 	}
+	g_controllerMapGeneration++;
 
 	UpdateNativeMenuKeys();
 }
@@ -956,6 +958,7 @@ void AutoConfForPad(const std::string &name) {
 	// Add a couple of convenient keyboard mappings by default, too.
 	g_controllerMap[VIRTKEY_PAUSE].push_back(KeyDef(DEVICE_ID_KEYBOARD, NKCODE_ESCAPE));
 	g_controllerMap[VIRTKEY_UNTHROTTLE].push_back(KeyDef(DEVICE_ID_KEYBOARD, NKCODE_TAB));
+	g_controllerMapGeneration++;
 #endif
 }