Compare window desktop id with currently active work area desktop id. (#2110)

* Compare window desktop id with currently active work area desktop id.

* Improve error handling and conform to coding guidelines.

* Move virtual desktop helper functions to ZoneWindowUtils namespace.

* Ensure thread safety when creating instance of VirtualDesktopManager.

* Remove static qualifier from ServiceProvider.

* Return instead of break, as there is no need to check for other monitors, virtual desktop is the same for all.

* Move virtual desktop related helper functions to separate files.

* Skip comparing desktop ids if zone window has empty GUID for desktop id.

* Add comment describion scenario for which we need this fix.

src/modules/fancyzones/lib/VirtualDesktopUtils.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "ZoneWindow.h"
+
+namespace VirtualDesktopUtils
+{
+    bool GetWindowDesktopId(HWND topLevelWindow, GUID* desktopId);
+    bool GetZoneWindowDesktopId(IZoneWindow* zoneWindow, GUID* desktopId);
+}