fix(zc): consume button presses in subscreen menu

The subscreen refactor ~6 months ago resulted in button presses not
being eaten. One side effect of this was the item selection sfx playing
for every frame the button was down, instead of the intended one time.

Author: connorjclark

src/zc/zc_subscr.cpp

@@ -148,7 +148,16 @@ void dosubscr()
 	// Consume whatever input was registered during opening animation.
 	if (replay_version_check(18))
 		load_control_state();
-	
+
+	bool legacy_btn_press_peek = false;
+	if (replay_is_active())
+	{
+		std::string qst = replay_get_meta_str("qst");
+		legacy_btn_press_peek |= qst == "demosp253.qst";
+		legacy_btn_press_peek |= qst == "first_quest_layered.qst";
+		legacy_btn_press_peek |= qst == "hell_awaits.qst";
+	}
+
 	do
 	{
 		if (replay_version_check(0, 11))
@@ -162,7 +171,7 @@ void dosubscr()
 		bool can_btn = !subscr_pg_animating;
 		if(can_btn)
 		{
-			byte btn_press = getIntBtnInput(0xFF, true, false, false, false, true);
+			byte btn_press = getIntBtnInput(0xFF, true, false, false, false, legacy_btn_press_peek);
 			int32_t pos = pg.cursor_pos;
 
 			if(rUp())         pg.move_cursor(SEL_UP);