[FancyZones] Added persistence to app zone history (#3132)

* Persist app zone history in a separate file

* Almost ready to be functionally tested

* Now all unit tests pass

* Bug fixes, it seems to work

* Various fixups

* Improved performance of FancyZones::UpdateWindowsPositions()

src/modules/fancyzones/lib/trace.cpp

@@ -24,10 +24,14 @@ ZoneSetInfo GetZoneSetInfo(_In_opt_ winrt::com_ptr<IZoneSet> set) noexcept
     {
         auto zones = set->GetZones();
         info.NumberOfZones = zones.size();
-        info.NumberOfWindows = std::count_if(zones.cbegin(), zones.cend(), [&](winrt::com_ptr<IZone> zone)
+        info.NumberOfWindows = 0;
+        for (int i = 0; i < static_cast<int>(zones.size()); i++)
         {
-            return !zone->IsEmpty();
-        });
+            if (!set->IsZoneEmpty(i))
+            {
+                info.NumberOfWindows++;
+            }
+        }
     }
     return info;
 }