Force GC to run periodically in order to reduce stuttering

Source/Engine/Scripting/ManagedCLR/MCore.h

@@ -106,6 +106,8 @@ public:
     {
         static void Collect();
         static void Collect(int32 generation);
+        static void Collect(int32 generation, MGCCollectionMode collectionMode, bool blocking, bool compacting);
+        static int32 MaxGeneration();
         static void WaitForPendingFinalizers();
         static void WriteRef(void* ptr, MObject* ref);
         static void WriteValue(void* dst, void* src, int32 count, const MClass* klass);

Source/Engine/Scripting/ManagedCLR/MTypes.h

@@ -56,6 +56,14 @@ enum class MTypes : uint32
     Enum = 0x55,
 };
 
+enum class MGCCollectionMode
+{
+    Default = 0,
+    Forced = 1,
+    Optimized = 2,
+    Aggressive = 3
+};
+
 #if USE_NETCORE
 
 enum class MTypeAttributes : uint32;