Remove scroll wheel hack

Source/diablo.cpp

@@ -746,6 +746,35 @@ void GameEventHandler(const SDL_Event &event, uint16_t modState)
 		MousePosition = { event.button.x, event.button.y };
 		HandleMouseButtonUp(event.button.button, modState);
 		return;
+#if SDL_VERSION_ATLEAST(2, 0, 0)
+	case SDL_MOUSEWHEEL:
+		if (event.wheel.y > 0) { // Up
+			if (stextflag != TalkID::None) {
+				StoreUp();
+			} else if (QuestLogIsOpen) {
+				QuestlogUp();
+			} else if (HelpFlag) {
+				HelpScrollUp();
+			} else if (ChatLogFlag) {
+				ChatLogScrollUp();
+			} else if (IsStashOpen) {
+				Stash.PreviousPage();
+			}
+		} else if (event.wheel.y < 0) { // down
+			if (stextflag != TalkID::None) {
+				StoreDown();
+			} else if (QuestLogIsOpen) {
+				QuestlogDown();
+			} else if (HelpFlag) {
+				HelpScrollDown();
+			} else if (ChatLogFlag) {
+				ChatLogScrollDown();
+			} else if (IsStashOpen) {
+				Stash.NextPage();
+			}
+		}
+		break;
+#endif
 	default:
 		if (IsCustomEvent(event.type)) {
 			if (gbIsMultiplayer)

Source/engine/events.cpp

@@ -101,6 +101,7 @@ bool FetchMessage_Real(SDL_Event *event, uint16_t *modState)
 	case SDL_TEXTEDITING:
 	case SDL_TEXTINPUT:
 	case SDL_WINDOWEVENT:
+	case SDL_MOUSEWHEEL:
 #else
 	case SDL_ACTIVEEVENT:
 #endif
@@ -120,25 +121,6 @@ bool FetchMessage_Real(SDL_Event *event, uint16_t *modState)
 		*event = e;
 		break;
 #ifndef USE_SDL1
-	case SDL_MOUSEWHEEL:
-#ifdef _DEBUG
-		if (IsConsoleOpen()) {
-			*event = e;
-			break;
-		}
-#endif
-		// This is a hack, mousewheel events should be handled directly by their consumers instead.
-		event->type = SDL_KEYDOWN;
-		if (e.wheel.y > 0) {
-			event->key.keysym.sym = (SDL_GetModState() & KMOD_CTRL) != 0 ? SDLK_KP_PLUS : SDLK_UP;
-		} else if (e.wheel.y < 0) {
-			event->key.keysym.sym = (SDL_GetModState() & KMOD_CTRL) != 0 ? SDLK_KP_MINUS : SDLK_DOWN;
-		} else if (e.wheel.x > 0) {
-			event->key.keysym.sym = SDLK_LEFT;
-		} else if (e.wheel.x < 0) {
-			event->key.keysym.sym = SDLK_RIGHT;
-		}
-		break;
 #if SDL_VERSION_ATLEAST(2, 0, 4)
 	case SDL_AUDIODEVICEADDED:
 		return FalseAvail("SDL_AUDIODEVICEADDED", e.adevice.which);