KeyMapper: Use forward_list instead of vector

Similar to how we do this for Padmapper.

Source/diablo.cpp

@@ -1761,6 +1761,7 @@ void InitKeymapActions()
 		    DebugToggle = !DebugToggle;
 	    });
 #endif
+	sgOptions.Keymapper.CommitActions();
 }
 
 void InitPadmapActions()

Source/options.cpp

@@ -1249,8 +1249,8 @@ KeymapperOptions::KeymapperOptions()
 std::vector<OptionEntryBase *> KeymapperOptions::GetEntries()
 {
 	std::vector<OptionEntryBase *> entries;
-	for (auto &action : actions) {
-		entries.push_back(action.get());
+	for (Action &action : actions) {
+		entries.push_back(&action);
 	}
 	return entries;
 }
@@ -1359,7 +1359,12 @@ bool KeymapperOptions::Action::SetValue(int value)
 
 void KeymapperOptions::AddAction(string_view key, const char *name, const char *description, uint32_t defaultKey, std::function<void()> actionPressed, std::function<void()> actionReleased, std::function<bool()> enable, unsigned index)
 {
-	actions.push_back(std::unique_ptr<Action>(new Action(key, name, description, defaultKey, std::move(actionPressed), std::move(actionReleased), std::move(enable), index)));
+	actions.emplace_front(key, name, description, defaultKey, std::move(actionPressed), std::move(actionReleased), std::move(enable), index);
+}
+
+void KeymapperOptions::CommitActions()
+{
+	actions.reverse();
 }
 
 void KeymapperOptions::KeyPressed(uint32_t key) const
@@ -1400,9 +1405,9 @@ void KeymapperOptions::KeyReleased(uint32_t key) const
 
 string_view KeymapperOptions::KeyNameForAction(string_view actionName) const
 {
-	for (const auto &action : actions) {
-		if (action->key == actionName && action->boundKey != SDLK_UNKNOWN) {
-			return action->GetValueDescription();
+	for (const Action &action : actions) {
+		if (action.key == actionName && action.boundKey != SDLK_UNKNOWN) {
+			return action.GetValueDescription();
 		}
 	}
 	return "";
@@ -1410,9 +1415,9 @@ string_view KeymapperOptions::KeyNameForAction(string_view actionName) const
 
 uint32_t KeymapperOptions::KeyForAction(string_view actionName) const
 {
-	for (const auto &action : actions) {
-		if (action->key == actionName && action->boundKey != SDLK_UNKNOWN) {
-			return action->boundKey;
+	for (const Action &action : actions) {
+		if (action.key == actionName && action.boundKey != SDLK_UNKNOWN) {
+			return action.boundKey;
 		}
 	}
 	return SDLK_UNKNOWN;

Source/options.h

@@ -638,6 +638,8 @@ struct KeymapperOptions : OptionCategoryBase {
 		// The implicit copy constructor would copy that reference instead of referencing the copy.
 		Action(const Action &) = delete;
 
+		Action(string_view key, const char *name, const char *description, uint32_t defaultKey, std::function<void()> actionPressed, std::function<void()> actionReleased, std::function<bool()> enable, unsigned index);
+
 		[[nodiscard]] string_view GetName() const override;
 		[[nodiscard]] OptionEntryType GetType() const override
 		{
@@ -652,7 +654,6 @@ struct KeymapperOptions : OptionCategoryBase {
 		bool SetValue(int value);
 
 	private:
-		Action(string_view key, const char *name, const char *description, uint32_t defaultKey, std::function<void()> actionPressed, std::function<void()> actionReleased, std::function<bool()> enable, unsigned index);
 		uint32_t defaultKey;
 		std::function<void()> actionPressed;
 		std::function<void()> actionReleased;
@@ -674,13 +675,14 @@ struct KeymapperOptions : OptionCategoryBase {
 	    std::function<void()> actionReleased = nullptr,
 	    std::function<bool()> enable = nullptr,
 	    unsigned index = 0);
+	void CommitActions();
 	void KeyPressed(uint32_t key) const;
 	void KeyReleased(uint32_t key) const;
 	string_view KeyNameForAction(string_view actionName) const;
 	uint32_t KeyForAction(string_view actionName) const;
 
 private:
-	std::vector<std::unique_ptr<Action>> actions;
+	std::forward_list<Action> actions;
 	std::unordered_map<uint32_t, std::reference_wrapper<Action>> keyIDToAction;
 	std::unordered_map<uint32_t, std::string> keyIDToKeyName;
 	std::unordered_map<std::string, uint32_t> keyNameToKeyID;