Benni Mack authored Mar 19, 2021 and Richard Haeser committed Mar 19, 2021

This change reduces the overhead of the d3 framework
by using native CustomEvents on the actual Lit element
of the SVG instead of d3-dispatch logic:

* typo3:svg-tree:nodes-prepared (enrich node data)
* typo3:svg-tree:expand-toggle (expand/collapse)
* typo3:svg-tree:node-context (clickmenu)
* typo3:svg-tree:node-selected (on-click)

As shown in the patch, the actual logic of interacting
with the outside framework (Persistent, ContextMenu, window.)
is moved to the actual Lit components, making the SVG
tree slimmer and easier to maintain.

Resolves: #93782
Releases: master
Change-Id: I6f5227579eb16ec218bbe67de2aecbcaaabb3fcc
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/68464


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Richard Haeser <richard@richardhaeser.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Richard Haeser <richard@richardhaeser.com>