SteamTarget: Support disabling standalone mode via cli-switch

GlosSITarget/SteamTarget.cpp

@@ -61,6 +61,7 @@ int SteamTarget::run()
     auto closeBPM = false;
     auto closeBPMTimer = sf::Clock{};
     if (!SteamOverlayDetector::IsSteamInjected()) {
+        if (Settings::common.allowStandAlone) {
             spdlog::warn("GlosSI not launched via Steam.\nEnabling EXPERIMENTAL global controller and overlay...");
             if (Settings::common.standaloneModeGameId == L"") {
                 spdlog::error("No game id set for standalone mode. Controller will use desktop-config!");
@@ -104,6 +105,7 @@ int SteamTarget::run()
                 overlay_.lock()->setEnabled(false);
             steam_overlay_present_ = true;
         }
+    }
     else {
         spdlog::info("Steam-overlay detected.");
         spdlog::warn("Double press Steam- overlay key(s)/Controller button to show GlosSI-overlay"); // Just to color output and really get users attention