link to "Standalone Validator" from "Testing Apps" navigational link, instead of interstitial page; fix spacing on "Test In-App Payments" page (bug 820227)
Merge pull request #2304 from cvan/link-to-standalone-validator

link to "Standalone Validator" from "Testing Apps" navigational link, instead of interstitial page; fix spacing on "Test In-App Payments" page (bug 820227)