add comment explaining why location check is needed

Author: jjw24

Plugins/Flow.Launcher.Plugin.Explorer/Search/SearchManager.cs

@@ -70,6 +70,7 @@ internal async Task<List<Result>> SearchAsync(Query query, CancellationToken tok
             if (isEnvironmentVariablePath)
                 locationPath = EnvironmentVariables.TranslateEnvironmentVariablePath(locationPath);
 
+            // Check that actual location exists, otherwise directory search will throw directory not found exception
             if (!FilesFolders.LocationExists(FilesFolders.ReturnPreviousDirectoryIfIncompleteString(locationPath)))
                 return results;