Set the name(not the description) as the Title of the Result (#4745)

* Added tests to verify that the name is always set as the title and never the description

* removed AppType as an argument

* refactored code

* added comments

* localized strings

* removed empty constructor

* made setsubtitle private

* removed the mock Win32 class used for unit testing

* removed the UWP tests

src/modules/launcher/Plugins/Microsoft.Plugin.Program/Programs/IProgram.cs

@@ -9,6 +9,7 @@ namespace Microsoft.Plugin.Program.Programs
         Result Result(string query, IPublicAPI api);
         string UniqueIdentifier { get; set; }
         string Name { get; }
+        string Description { get; set; }
         string Location { get; }
     }
 }