Fixes to UniversalSearch and to allow https

LunaUniversalSearchMgr requires url instead of loc_url and therefore wasn't working. Also added support for https urls in the code and updated the search engines (Google, Wiki and Amazon) to https and removed Twitter because it was no longer working after an API update a while ago.

Open-webOS-DCO-1.0-Signed-off-by: Herman van Hazendonk <github.com@herrie.org>