Maelstrom: Allow using the gamepad back button to escape dialogs and quit

SDL Commits
1 
From fcab516b2cc8204c46af06ce7b57f36b1301158c Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Sun, 29 Mar 2026 09:25:39 -0700
Subject: [PATCH] Allow using the gamepad back button to escape dialogs and
 quit

---
 screenlib/SDL_FrameBuf.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/screenlib/SDL_FrameBuf.cpp b/screenlib/SDL_FrameBuf.cpp
index 8f4c1979..7d463f56 100644
--- a/screenlib/SDL_FrameBuf.cpp
+++ b/screenlib/SDL_FrameBuf.cpp
@@ -199,6 +199,9 @@ FrameBuf::ProcessGamepadEvent(SDL_Event *event)
 				key = SDLK_ESCAPE;
 				break;
 			default:
+				if (event->gbutton.button == SDL_GAMEPAD_BUTTON_BACK) {
+					key = SDLK_ESCAPE;
+				}
 				break;
 			}
 			if (key != SDLK_UNKNOWN) {