Combine StartAllListeners() and StartNeededListeners()...

And call the new method StartListeners().  This also adjusts what was
previously StartAllListener() to be group-listener aware.

Change-Id: I74de45c00f5b8ef232eea9fe3b93aa44d1d8855b
Use group area listeners when filling down formula cells via fill series.

Change-Id: Ib0d4f542986dc09968cad8b76da9d6e034eddd37