[FIXED JENKINS-7649] Only including one SCMTrigger.BuildAction per build, since there's only one possible polling log to link to.

While editing description, inline help should show the syntax guide based on the current markup formatter.

Note that the above description is incorrect as to what the merge was about.
It is the message that I intended to make. It appears that I accidentaly merged multiple fixes waiting to be reviewed on my private fork.

This reverts commit dce0d2af, reversing
changes made to 63f67f30.

Looks like I broke this in d88df7ea

Yes, this is HUDSON-8656 and not JENKINS-8656.

(recording the previous commit 9d7d0d75 by Richie Vos)

add "since 1.378" in one changelog item

Eclipse package depends on this
<http://packages.ubuntu.com/maverick/eclipse-jdt>, so I'm doing
monkey-see-monkey-do.

Recording the earlier changes and the integration of the new
executable-war.

Jerome Lacoste reported that 5c91eb1f fixed JENKINS-7745. So marking it as closed.