Updated: The file manifest carries the checksums of ezjscore 1.4.0 with jQuery 4, the admin designs on jQuery 4 and Exponential UI, the rich text editor's jQuery 4 fixes and the deploy command.

Updated: exp:velocity deploy always clears the design_base cache and, with the new --packer option, the ezjscore packer cache right before template-block, so that a newly activated extension's templates are found and cached page heads never point to removed packed files.

The design base cache keeps the list of design directories of the extensions
active when it was written; without clearing it, a newly activated extension's
templates were not found. The packer cache is cleared only with --packer, when
what a packer server function returns has changed, and always together with
template-block: cleared alone, cached admin page heads named packed files that
no longer existed and the admin lost its scripts and styles. The help text and
doc/bc/6.0/velocity-engines.md describe both, with an example run.

Fixed: Fixed the rich text editor's custom tag and table cell dialogs, which called .size() that jQuery 3 had already removed, and updated its popups for jQuery 4, so that inserting links, tables and other tags works on jQuery 4.

.size() becomes .length. jQuery.trim(), removed from jQuery 4, becomes
String(value ?? '').trim(), which keeps its answer for empty values (also in the
popup validation and the editor theme). The popups' save, cancel and tag
selector handlers and the link dialog's handlers use .on() and .trigger()
instead of the deprecated shorthands. Tested by use: the link popup opens on
jQuery 4, validates its fields and inserts the link into the editor.

Updated: Moved the admin designs' collapsible menus and edit toolbar from YUI to Exponential UI, so that admin, admin2 and admin3 run them on jQuery 4 with the same behaviour.

The right menu (admin, admin2) and the edit page's object information menu
(admin, and the commented-out copy in admin3) use Exp.collapse() with the
configuration they had for YUI's Y.eZ.CollapsibleMenu, and save the same user
preferences. Without Exponential UI the right menu's link still works as a plain
preference address. fixed_toolbar.js stands aside when Exponential UI's
exp::sticky runs the edit toolbar, so there is one owner. Added the head hook
page_head_exp.tpl, empty in the kernel and included by the admin designs before
their scripts, through which an extension adds to the head; Exponential UI puts
its page configuration there. The header search's last .focus() and .blur()
shorthands are replaced too. Tested by use in admin, admin2 and admin3, on
Velocity and on PHP-FPM.

Updated: Updated the admin design's jQuery code for jQuery 4, so that the admin runs on it without errors and without jQuery Migrate warnings.

The event shorthands (.click(fn), .change(fn) and their triggers), .bind() and
.unbind(), boolean .attr() calls and jQuery.trim(), which jQuery 4 removed or
deprecated, are replaced by .on(), .off(), .trigger(), .prop() and
String.prototype.trim(): in the node tabs, the class list and class editor, the
role policy editor, the translations, locations, ordering and details tabs, the
extension list, the header search, the object relation search, the sub-items
table's actions and the left menu's width control. Tested by use: the tabs and
their on/off switch, the search, the class and extension lists.

Updated: Updated ezjscore to 1.4.0 so that ezjsc::jquery loads jQuery 4.0.0 with jQuery Migrate 4.0.2 and ezjsc::jqueryUI loads jQuery UI 1.14.2, which supports jQuery 4.

ezjscore now ships the jQuery 4.0.0, jQuery Migrate 4.0.2 and jQuery UI 1.14.2
release files with their licences, and names them in ezjscore.ini. jquery()
loads the jqueryMigrate file right after jQuery when it is set; the quiet
Migrate build is the default, so older code keeps working without filling the
console, and the reporting build is one setting away. The CDN entries, which
still named jQuery 1.10.2 and jQuery UI 1.10.3, name the same releases as the
local files. The jQuery 3.7.1, Migrate 3.4.1 and jQuery UI 1.10.3 files stay for
templates that name them directly. extension.xml and the new ezinfo.php carry
the version 1.4.0 and list the libraries.

Updated: The file manifest carries the checksum of composer.json with ezupdate 1.1.8