adding fancy zone opacity setting, enhancement #631 (#1008)

* adding fancy zone opacity setting, enhancement #631

* applying zone opacity setting to all zones during zone selection

* changing opacity setting to percentage

src/modules/fancyzones/tests/UnitTests/ZoneWindow.Spec.cpp

@@ -22,6 +22,11 @@ namespace FancyZonesUnitTests
         {
             return m_guid;
         }
+        IFACEMETHODIMP_(int)
+        GetZoneHighlightOpacity() noexcept
+        {
+            return 100;
+        }
 
         GUID m_guid;
     };