Bug 1049569 - Sanitize e.me app url results. r=kgrandon

e.me app result urls often miss the trailing slash. Sanitize them so we
get better bookmarking behaviour in the system browser.
Merge pull request #22580 from Cwiiis/bug1049569-sanitize-eme-urls

Bug 1049569 - Sanitize e.me app url results. r=kgrandon