Thread scheduler rewrite (#393)

* Started to rewrite the thread scheduler

* Add a single core-like scheduling mode, enabled by default

* Clear exclusive monitor on context switch

* Add SetThreadActivity, misc fixes

* Implement WaitForAddress and SignalToAddress svcs, misc fixes

* Misc fixes (on SetActivity and Arbiter), other tweaks

* Rebased

* Add missing null check

* Rename multicore key on config, fix UpdatePriorityInheritance

* Make scheduling data MLQs private

* nit: Ordering

Ryujinx.HLE/HOS/Services/Sm/IUserInterface.cs

@@ -57,7 +57,7 @@ namespace Ryujinx.HLE.HOS.Services.Sm
                 return 0;
             }
 
-            KSession Session = new KSession(ServiceFactory.MakeService(Name), Name);
+            KSession Session = new KSession(ServiceFactory.MakeService(Context.Device.System, Name), Name);
 
             int Handle = Context.Process.HandleTable.OpenHandle(Session);