Add various fixes for Web

Source/Engine/Platform/Web/WebPlatform.cpp

@@ -7,7 +7,6 @@
 #include "Engine/Core/Log.h"
 #include "Engine/Core/Types/String.h"
 #include "Engine/Core/Types/Version.h"
-#include "Engine/Core/Types/TimeSpan.h"
 #include "Engine/Core/Types/Guid.h"
 #include "Engine/Platform/CPUInfo.h"
 #include "Engine/Platform/MemoryStats.h"
@@ -52,7 +51,7 @@ MemoryStats WebPlatform::GetMemoryStats()
     MemoryStats result;
     result.TotalPhysicalMemory = emscripten_get_heap_max();
     result.UsedPhysicalMemory = emscripten_get_heap_size();
-    result.TotalVirtualMemory = result.TotalPhysicalMemory;
+    result.TotalVirtualMemory = 2ull * 1024 * 1024 * 1024; // Max 2GB
     result.UsedVirtualMemory = result.UsedPhysicalMemory;
     result.ProgramSizeMemory = 0;
     return result;

Source/Engine/Platform/Web/WebPlatform.h

@@ -77,7 +77,7 @@ public:
 #ifdef __EMSCRIPTEN_PTHREADS__
         return (uint64)pthread_self();
 #else
-        return 0;
+        return 1;
 #endif
     }
     static String GetSystemName();