atk4/atk4 — pull request #385 by DarkSide666 (2013-08-05 16:40:28+00:00)
Title: Grid: formatters related changes

1) slightly improved usage of format_totals_*
2) totals title setting moved to appropriate place
3) ability to silently ignore (disabled by default) not existent formatters - used for totals row. That allows us to not duplicate every format_* method as empty method format_totals_*.
4) merged two CSS classes used to identify expander column.
5) more .... ?