Add another RPi hack to fix mouse capture in full-screen in LXDE

app/streaming/session.cpp

@@ -461,6 +461,15 @@ bool Session::initialize()
         break;
     }
 
+    // HACK: Using a full-screen window breaks mouse capture on the Pi's LXDE
+    // GUI environment. Force the session to use windowed mode (which won't
+    // really matter anyway because the MMAL renderer always draws full-screen).
+    if (qgetenv("DESKTOP_SESSION") == "LXDE-pi") {
+        SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
+                    "Forcing windowed mode on LXDE-Pi");
+        m_FullScreenFlag = 0;
+    }
+
     // Check for validation errors/warnings and emit
     // signals for them, if appropriate
     bool ret = validateLaunch(testWindow);