Update note after this was done wrong yet again

Co-authored-by: NJesse Glick <jglick@cloudbees.com>
Co-authored-by: NTim Jacomb <t.jacomb@kainos.com>
Co-authored-by: NDaniel Beck <1831569+daniel-beck@users.noreply.github.com>

Co-Authored-By: NDaniel Beck <1831569+daniel-beck@users.noreply.github.com>

[JENKINS-36720] Spotbugs fixes

Follow up optimizations to getAllItems() and getItems()

[JENKINS-36720] Fix instances of double checked locking

Always set a crumb issuer

[JENKINS-36720] Spotbugs fix possible NPE

Adding french translation for concurrent build help

* New styles for breadcrumbs and warnings monitor

* Adds the svgxuse polyfill for svg sprites on IE 11

* Created new styles for the page header

- Used the material icons svg sprites to deliver the icons
- Icons are rendered using a <svg> tag

* Create new base styles file and undo changes to the layout-common and style css files

* Fixes and refactor for the new UI CSS code

* Make the new header color and logo section opt-in

- The new UI can be toggled with the -Dui.enableNewUi=true flag

* Rename and refactor the page-header css

- Rename the css class namespace from .main-header to .page-header
- Page header CSS moved into a modules folder and now included on the new-base-styles.css. This is done to avoid loading a separate file everytime.
- Extracted color variables to their own file

* Updated localization for header and admin monitor

- The pageHeader template receives localization strings as props
- Missing translation for the admin monitor on the it, bg and pl locales

* Update core/src/main/resources/lib/layout/layout.jelly
Co-Authored-By: NTim Jacomb <t.jacomb@kainos.com>

* Most measurements migrated to REMs

* Code cleanup and apply new-ui toggle to the html.jelly file

* Breadcrumb fixes

- Reverts breadcrumb link styling to use nested selectors instead of the .breadcrumbs__link class. The reason is that several plugins would break.
- Shifted margins so that breadcrumbs can be fullwidth in the absence of the auto refresh link

* Implemented some fixes from the feedback received

- Removed box shadow webkit prefix
- Fixed formatting on the breadcrumbs.css and layout-commons.less files
- Renamed the new UI toggle class from _new-ui_ to _ui-refresh_
- Renamed references to the _new ui_ to _v2_

* Created jelly helper to use svg icons

* Fix: restore proper icon for the user on the header

* Fixes for Edge, IE 11 and IE 10

* Improvements on the header and breadcrumbs

- Logo v2 changed and optimized using the svgo frontend https://jakearchibald.github.io/svgomg/
- Refactored the ammonitor insertion code
- Breadcrumbs are no longer capitalized
- Classic logo link no longer stretches past the images
- Fixed classic logo link on IE11
- Updated color of the footer
- Menu items background is also changed when hovering over the menu selector
- Removed copyright notice on top of some files

* Bumped JTH version with the SVG download fix

* Update test/pom.xml
Co-Authored-By: NTim Jacomb <t.jacomb@kainos.com>

* Added a function to check boolean system properties from jelly

* Fix header links and add svg styles for legacy layout

*  Some bug fixing for the new header

- The ui-refresh changes were not properly being enabled with the boolean system property. Added explicit true check on the jelly templates.
- Added an explicit width for the ui-refresh logo because it would mess with the layout

* Update core/src/main/java/hudson/Functions.java
Co-Authored-By: NAdrien Lecharpentier <adrien.lecharpentier@gmail.com>

* Do not check the system property on every page render
Co-authored-by: NTim Jacomb <t.jacomb@kainos.com>
Co-authored-by: NAdrien Lecharpentier <adrien.lecharpentier@gmail.com>
Co-authored-by: NDaniel Beck <1831569+daniel-beck@users.noreply.github.com>

Co-Authored-By: NAdrien Lecharpentier <adrien.lecharpentier@gmail.com>

[JENKINS-61121] Fix too many open files with resource domain

Co-Authored-By: NJesse Glick <jglick@cloudbees.com>

Improve performance when loading tied jobs

Signed-off-by: NJean-Baptiste Le Duigou <jb.leduigou@gmail.com>

Signed-off-by: NJean-Baptiste Le Duigou <jb.leduigou@gmail.com>

[JENKINS-60966] Order admin monitors in Global Configuration

[JEP-223] Overall/Manage permission

* Allow plugins to force an update of the UpdateCenter

* Add javadoc to updateDirectlyNow

* [JENKINS-61046] introduce updateDirectlyNow() and updateDirectly()

@oleg-nenashev notes that the public API should not expose the security
option that is for testing.  Introduced updateDirectlyNow() as the new
API and updateDirectly() to have a mirror and deprecated
updateDirectly(boolean) as a consequence.

* fix javadoc grammar

fixes the grammar of the UpdateSite#updateDirectlyNow javadoc
Co-Authored-By: NRaihaan Shouhell <raihaanhimself@gmail.com>
Co-authored-by: NRaihaan Shouhell <raihaanhimself@gmail.com>

Make memory usage graph discoverable

Co-Authored-By: NOleg Nenashev <o.v.nenashev@gmail.com>

[JENKINS-60866] Un-inline JavaScript / CSS from HudsonPrivateSecurity…