For multiple line warning messages, this makes them little bit spaced, but I think it's OK.

Plus more simplifications

Using prototype.js to simplify the code

On Chrome (and possibly others), an inline element like span doesn't enlarge
its size to cover its content, so the 1px place holder wasn't taking effect.

To ensure the minimum height of 16px, make it an inline-block element. I'm
not entirely sure how an inline-block element with no fixed width would behave,
but with a bit of casual testing, the text inside seems to wrap OK.

- Improved logging and recovery for the Record thread that dies in the middle.
- Recover from failing to monitor one node and move on to the next.

This allows administrator to remove this problematic file.

For example, a new job might have a trigger setting to begin with,
or it might resolve a reference that was previously failing (for
example, 'up' job referring to 'down' job and the 'down' job is newly
created.)

Observations:

- When marked inside, moving the mouse to <A> and clicking the context menu becomes easier,
  because you can move the mouse toward the hot spot area and it'll activate.
  Otherwise you have to move the mouse over to <A>, then move the mouse on the side, click it,
  then click the menu, which adds cognitive stress.

- Marking model link as inside creates an empty space to the right of <A>, which looks
  odd if hyperlinks appear inline or if some other text follows it.

Given that, my guiding principle for this change is:

- any model link that is the last child of a block element gets marked as inside
- I've adjust a few text to get rid of the single-letter training text after a model link,
  like "(#3)" to "- #3"
- If another inline element follows a model link, leave it as is.
  This does create an ugly overlap.

This prevents one pixel height difference between the logo and the title
bar background.

And both values need to be still bigger than the z-index of the top sticker
since the breadcrumb bar is on the top-sticker

Object that implements ModelObjectWithChildren can expose its children in the breadcrumb.

Made the 'v' icon bigger to increase the hit test area, and improved the alignment
logic so that the text and the 'v' icon gets vertically aligned.

Now that the context menu is open only when clicking 'v', the tooltip on model link should
be displayed as soon as the mouse hovers over it.

I'm not really sure what this code is doing or what ID is supposed to look like. So this is just a minimum-intrusion change to avoid an exception.

java.lang.StringIndexOutOfBoundsException: String index out of range: -1
        at java.lang.String.substring(String.java:1875)
        at hudson.tasks.junit.PackageResult.findCorrespondingResult(PackageResult.java:86)
        at hudson.tasks.junit.TestResult.findCorrespondingResult(TestResult.java:295)
        at hudson.tasks.test.AbstractTestResultAction.findCorrespondingResult(AbstractTestResultAction.java:183)
        at hudson.tasks.test.TestResult.getResultInBuild(TestResult.java:162)
        at hudson.tasks.junit.History.getList(History.java:82)
        at hudson.tasks.junit.History$1.createDataSet(History.java:105)
        at hudson.tasks.junit.History$GraphImpl.createGraph(History.java:169)
        at hudson.util.Graph.render(Graph.java:87)
        at hudson.util.Graph.doPng(Graph.java:98)

JENKINS-17416 - Improve Wipe Out Workspace label

Added logging more liberally, and fixed the problem.
The root cause was that when the mouse enters a hot spot, I wasn't cancelling the previous delayed hide timer.

This fix eliminates the need for the hack in the hide method where I was testing if the mouse was still over the hotspot.