* [JENKINS-10912] Use setInterval in refreshPart

The current implementation of refreshPart creates a new closure every 5
seconds, which, in combination with XMLHttpRequest objects, results in a
significant memory leak in all major browsers. By using
window.setInterval to schedule periodic refreshes, only one closure per
id is created. Please see issue #10912 in the Jenkins tracker for
further details.

* Stop periodical calls if we can't find the div

* Don't check if isRunAsTest changed after page load

* [JENKINS-37857] Prompt user whether to add the job to the current view

* [JENKINS-37857] Fix review items from @daniel-beck

* [FIXED JENKINS-37731] Change symbol and constructor for SCMTrigger.

Using "scm" as the @Symbol led to collisions with the "scm" global
variable in Pipeline, so that had to go. Changed it to "pollScm". Also
moved the @DataBoundConstructor to the single-parameter constructor,
deprecated the two-parameter constructor, created a @DataBoundSetter
for ignorePostCommitHooks, and added a getter for "scmpoll_spec" to
fix snippet generator and general syntactic goodness.

So now, with this, it's possible to do:

properties([
  pipelineTriggers([
    pollScm('@daily')
  ])
])

Tada.

Tests for the snippet generator and job property stuff will be landing
in a separate PR for workflow-multibranch.

* Review comments.

* Updating @since to 2.22

For example when Descriptor was defined as field and without @Extension .
Signed-off-by: NKanstantsin Shautsou <kanstantsin.sha@gmail.com>

Use the appropriate 'Gear' icon on the Plugin Manager page

Fix groovy test class declaration

This has annoyed me for long enough

Fixes JENKINS-34250

Summary of changes:

* [JENKINS-36420](https://issues.jenkins-ci.org/browse/JENKINS-36420) - Allow setting up the the client idle timeout
* Upgrade to the new parent POM
* FindBugs cleanup, in particular https://github.com/jenkinsci/sshd-module/commit/66162e707189e6bda5708cf856e71b6130160cc1

* [JENKINS-37874] - Log SEVERE messages if Jenkins does not reach COMPLETED stage during startup or reload

* [JENKINS-37874] - Add Administrative monitor for the COMPLETED state

* [JENKINS-37874] - Polish log messages

* make the icon of the script console configurable

* we don't need an extra variable

* use <j:choose>

* remove restriction to be able to ovverride the method in subclasses

* since needs to be adjusted

Add newline after the text in userContent/readme.txt

Hard to see anything with Gray background and White Text.
Style is in line with Selects and other form inputs.

* [JENKINS-36748] Add a test case and not process null specs

* [JENKINS-36748] Correct license and add a minor comment

* [JENKINS-36748] Add a Waning logger when spec is null