Url Encode the filter text for the NPM query

Author: Paul van Brenk

Nodejs/Product/Npm/IPackageCatalog.cs

@@ -50,8 +50,7 @@ public async Task<IEnumerable<IPackage>> GetCatalogPackagesAsync(string filterTe
 
             // All exceptions thrown here and in the called methods are handled by the
             // NPM search dialog, so we don't have to do any exception handling here.
-
-            var relativeUri = string.Format("/-/v1/search?text={0}", filterText);
+            var relativeUri = string.Format("/-/v1/search?text={0}", WebUtility.UrlEncode(filterText));
             var searchUri = new Uri(defaultRegistryUri, relativeUri);
 
             var request = WebRequest.Create(searchUri);