fix(ui): Started from Steam, the app runs without Steam's overlay (Qt aborted) and stays in the foreground, so Steam Input gives it the controller

ui/steamify-ui

@@ -20,6 +20,14 @@ import tempfile
 import threading
 import time
 
+# Started from Steam (a non-Steam game, so Steam Input hands it the
+# controller): Steam preloads its overlay into every game, and Qt aborts with
+# it loaded. Start again without it, before Qt is imported.
+if "gameoverlayrenderer" in os.environ.get("LD_PRELOAD", ""):
+    os.environ["LD_PRELOAD"] = ":".join(p for p in os.environ["LD_PRELOAD"].split(":")
+                                        if p and "gameoverlayrenderer" not in p)
+    os.execv(sys.executable, [sys.executable] + sys.argv)
+
 HERE = os.path.dirname(os.path.realpath(__file__))
 
 try: