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/FancyZonesLib.vcxproj

@@ -103,6 +103,7 @@
     <ClInclude Include="Settings.h" />
     <ClInclude Include="trace.h" />
     <ClInclude Include="util.h" />
+    <ClInclude Include="VirtualDesktopUtils.h" />
     <ClInclude Include="Zone.h" />
     <ClInclude Include="ZoneSet.h" />
     <ClInclude Include="ZoneWindow.h" />
@@ -117,6 +118,7 @@
     <ClCompile Include="Settings.cpp" />
     <ClCompile Include="trace.cpp" />
     <ClCompile Include="util.cpp" />
+    <ClCompile Include="VirtualDesktopUtils.cpp" />
     <ClCompile Include="Zone.cpp" />
     <ClCompile Include="ZoneSet.cpp" />
     <ClCompile Include="ZoneWindow.cpp" />