- Merged from FN/Main to 4.23:

- Added early check before creating a TargetPlatform object if the PlatformInfo will be found (check a static function to see if it's usable before making it)
- Changed each platform's GetTargetPlatform[s] function
#rb none
#jira UE-78692

[CL 8031412 by Josh Adams in 4.23 branch]

Engine/Source/Developer/HTML5/HTML5TargetPlatform/Private/HTML5TargetPlatformModule.cpp

@@ -36,7 +36,7 @@ public:
 
 	virtual ITargetPlatform* GetTargetPlatform( ) override
 	{
-		if (Singleton == NULL)
+		if (Singleton == NULL && FHTML5TargetPlatform::IsUsable())
 		{
 			// finally, make the interface object
 			Singleton = new FHTML5TargetPlatform();