Even a diehard R&B connoisseur could be forgiven for not recognizing the name of Jeanette Jones.  She only had one solo single to her name: 1969’s “The Thought of You” b/w “Darling I’m Standing by You,” released on the small Golden Soul label out of San Francisco.  But in the 21st century, the musical archaeologists at Ace Records began issuing lost masters from this lost singer, building up a small but powerfully vivid catalog from the mystery-shrouded vocalist.  Now, in association with Ace, the new Playback Records label has collected Jones’ complete…