Allow loose partial keyword matches in Games DB search

[Kat Rollo]

Raising a ticket as suggested by @Retro808 in this thread.

Quote:

Searching for "alone dark nightmare" will return 0 results. You need to search for exact game title like "alone in the dark the new nightmare" or exact phrases as they appear in the title like "alone in the dark" to return results.

The enhancement is too allow loose keyword matching rather than exact substrings like “alone in the“.