Graph command option to ignore suicide triggers.
Ignore suicide check button for gcylc graph popup.
Ignore suicide option for gcylc graph view.
Updated the change log.
Ensure remote task behaviour is determined by suite host site/user config.

Pass messaging config (retry and timeouts) via the task environment,
rather than loading from site/user config on the remote task host.
Merge pull request #465 from hjoliver/464.ignore-suicide-triggers-in-graph

Graph command option to ignore suicide triggers.
Merge pull request #466 from hjoliver/site-user-config-for-task-hosts

Ensure remote task behaviour determined by suite host site/user config
Make graph "ignore suicide triggers" work with family collapse/expand.

Also moves the functionality to a graph viewer toolbar item.
Merge pull request #467 from hjoliver/revisit.ignore-suicide-triggers

Make graph "ignore suicide triggers" work with family collapse/expand.
Start with grouped families in gcylc.

Also removes non-first-parent headings in family-grouped dot view.
Some code reuse.
Merge pull request #468 from hjoliver/gcylc-default-to-grouped

Start with grouped families in gcylc.