Handle named database ranges in CreateString().

Change-Id: I6904b9de0f7d711252797bb2e33ba4c462476b2d
Handle sheet-local range names too.

Change-Id: Ib1503c3b69d77946b4437bdc0e1bfa5ebacbb602
Let's have makeRefStr() take individual parameters again.

And remove use of TokenStringContext from ScCompiler.

Change-Id: Ib0636e2437a64edd372623a7176dab462eed831b