Make --pause-menu-exit quit the app whenever the game ends

- Fixes #18456

For external launchers (Android handhelds like the Retroid Pocket), which want
control back when the game ends. Before, only the pause menu's Exit quit the
app; now the game exiting by itself, a stop request and dismissing a load
error do too.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Core/CmdLine.cpp

@@ -189,7 +189,7 @@ static const CommandLineParam g_autoParams[] = {
 	{POFF(fullscreen), CmdParamType::BoolInverse, "windowed", '\0', "Force windowed mode", CmdLineMode::Application},
 	{POFF(startScreen), CmdParamType::String, "start-screen", '\0', "Start on a specific screen (e.g. 'gamesettings', 'touchscreentest')", CmdLineMode::Application},
 	{POFF(escapeExit), CmdParamType::Bool, "escape-exit", '\0', "Escape key exits the application", CmdLineMode::Application},
-	{POFF(pauseMenuExit), CmdParamType::Bool, "pause-menu-exit", '\0', "Change \"Exit to menu\" in pause menu to \"Exit\"", CmdLineMode::Application},
+	{POFF(pauseMenuExit), CmdParamType::Bool, "pause-menu-exit", '\0', "Exit the application when the game ends, instead of returning to the menu", CmdLineMode::Application},
 	{POFF(appendConfig), CmdParamType::String, "appendconfig", '\0', "Merge config FILE into the current configuration"},
 	{POFF(root), CmdParamType::String, "root", 'r', "Mount directory as the root of host0:/."},
 	{POFF(memStick), CmdParamType::String, "memstick", '\0', "Memory stick root directory (contains PSP/GAME etc)"},