SaveTool: suppress Nvidia debug message.

I probably won't need it, but if someone has a rendering issue, being
able to debug it using GPU validation will be useful, and avoiding log
pollution will be even better.

src/SaveTool/SaveTool.cpp

@@ -24,7 +24,9 @@
 #include <Corrade/Utility/String.h>
 #include <Corrade/Utility/Unicode.h>
 
+#include <Magnum/GL/DebugOutput.h>
 #include <Magnum/GL/DefaultFramebuffer.h>
+#include <Magnum/GL/Extensions.h>
 #include <Magnum/GL/Renderer.h>
 
 #include <Magnum/ImGuiIntegration/Integration.h>
@@ -153,6 +155,12 @@ SaveTool::SaveTool(const Arguments& arguments):
         _thread = std::thread{[this]{ checkForUpdates(); }};
         _queue.addToast(Toast::Type::Default, "Checking for updates...");
     }
+
+    if(GL::Context::current().isExtensionSupported<GL::Extensions::KHR::debug>() &&
+       GL::Context::current().detectedDriver() == GL::Context::DetectedDriver::NVidia)
+    {
+        GL::DebugOutput::setEnabled(GL::DebugOutput::Source::Api, GL::DebugOutput::Type::Other, {131185}, false);
+    }
 }
 
 SaveTool::~SaveTool() {