[FIX JENKINS-17114] Distinguish 'nodes offline' from 'no nodes'

[FIX JENKINS-19250] Add causes to queue item tool tip

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>

[FIX JENKINS-22617] Fix path to deletion of JVM Crash error log

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>

[FIXED JENKINS-18626] - Test result page keeps identifying tests as age 1

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>

[FIXED JENKINS-22693] - Properly close InputStreams in FileParameterValue

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>

[FIXED JENKINS-22934] Show poll thread count option when necessary.

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>

[FIX JENKINS-8358] Use DISABLED_ANIME icon while building

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>

[FIXED JENKINS-20031] Useful error message when UC not found

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>

[JENKINS-20499] Don't fail horribly with null causes

Changing the number of provided plugins.

The number of provided plugins was outdated.

[FIX JENKINS-22818] fix jenkins restart on Linux after plugin update if the java executable running Jenkins is started without its full path

The patch uses 'execvp' instead of 'execv' to lookup the java executable filename in the PATH if the specified filename does not contain a slash (/) character.
Regression introduced in 547d4ed8

[FIXED JENKINS-22822] PeepholePermalink should maintain an in-memory cache of symlinks to avoid disk I/O.

[JENKINS-20739] Filter descriptors before adding them to hetero-list

[JENKINS-23151] Need to revert part of 5789f0c7 since codemirror-mode on f:textarea apparently does not work for lazy-load fragments.

Jenkins currently does not distinguish between 'All nodes for a
label are offline' and 'There are no nodes for a label'. This is
exacerbated by the current wording:

    All nodes of label 'foo' are offline

Instead of just changing the wording to something not seeming to
imply existence of such nodes, add a second wording that clearly
states that there are no such nodes.