Report loading screens to osg stats

apps/openmw/mwgui/loadingscreen.cpp

@@ -343,7 +343,12 @@ namespace MWGui
 
         MWBase::Environment::get().getInputManager()->update(0, true, true);
 
-        mResourceSystem->reportStats(mViewer->getFrameStamp()->getFrameNumber(), mViewer->getViewerStats());
+        osg::Stats* const stats = mViewer->getViewerStats();
+        const unsigned frameNumber = mViewer->getFrameStamp()->getFrameNumber();
+
+        stats->setAttribute(frameNumber, "Loading", 1);
+
+        mResourceSystem->reportStats(frameNumber, stats);
         if (osgUtil::IncrementalCompileOperation* ico = mViewer->getIncrementalCompileOperation())
         {
             ico->setMinimumTimeAvailableForGLCompileAndDeletePerFrame(1.f / getTargetFrameRate());

components/resource/stats.cpp

@@ -54,6 +54,7 @@ namespace Resource
             constexpr std::string_view firstPage[] = {
                 "FrameNumber",
                 "",
+                "Loading",
                 "Compiling",
                 "WorkQueue",
                 "WorkThread",
@@ -75,7 +76,6 @@ namespace Resource
                 "",
                 "",
                 "",
-                "",
             };
 
             static_assert(std::size(firstPage) == itemsPerPage);