Mark UWP platform as deprecated

Source/Editor/Cooker/Platform/UWP/UWPPlatformTools.cpp

@@ -497,6 +497,8 @@ bool UWPPlatformTools::OnPerformAOT(CookingData& data, AotConfig& config, const
 
 bool UWPPlatformTools::OnPostProcess(CookingData& data)
 {
+    LOG(Error, "UWP (Windows Store) platform has been deprecated and soon will be removed!");
+
     // Special case for UWP
     // FlaxEngine.dll cannot be added to the solution as `Content` item (due to conflicts with C++ /CX FlaxEngine.dll)
     // Use special directory for it (generated UWP project handles this case and copies lib to the output)

Source/Editor/Windows/GameCookerWindow.cs

@@ -257,6 +257,7 @@ namespace FlaxEditor.Windows
                             break;
                         case PlatformType.UWP:
                             name = "Windows Store";
+                            layout.Label("UWP (Windows Store) platform has been deprecated and soon will be removed!", TextAlignment.Center).Label.TextColor = Color.Red;
                             break;
                         case PlatformType.Linux:
                             name = "Linux";