sys_categories FAL image editor - typo3

Question

I need to activate the "Image editor" for TYPO3 (8.7) sys_categories. In every other Element which uses FAL the editor is available. Only in the Category Images I did not have this option.
How do I active it?
I've tried to set the exact same TCA to this field but no changes.
Here is the TCA (of the tx_news) Extension:
'images' => [
'exclude' => true,
'l10n_mode' => 'mergeIfNotBlank',
'label' => $ll . 'tx_news_domain_model_category.image',
'config' => \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::getFileFieldTCAConfig(
'images',
[
'appearance' => [
'createNewRelationLinkTitle' => 'LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:images.addFileReference',
'showPossibleLocalizationRecords' => true,
'showRemovedLocalizationRecords' => true,
'showAllLocalizationLink' => true,
'showSynchronizationLink' => true
],
'foreign_match_fields' => [
'fieldname' => 'images',
'tablenames' => 'sys_category',
'table_local' => 'sys_file',
],
],
$GLOBALS['TYPO3_CONF_VARS']['GFX']['imagefile_ext']
)
]
Also this file on GitHub: https://github.com/georgringer/news/blob/master/Configuration/TCA/Overrides/sys_category.php

Answer 1

You might compare your TCA with the configuration for field assets in record tt_content.
As the cropping is stored in sys_file_reference I would have a closer look to the showitem value "imageoverlayPalette"

Answer 2

Answer
The config index "foreign_types" were missing. Override the TCA settings like this and it works:
<?php
defined('TYPO3_MODE') or die();
$ll = 'LLL:EXT:news/Resources/Private/Language/locallang_db.xlf:';
$newSysCategoryColumns = [
'images' => [
'exclude' => true,
'label' => $ll . 'tx_news_domain_model_category.image',
'config' => \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::getFileFieldTCAConfig(
'images',
[
'behaviour' => [
'allowLanguageSynchronization' => true,
],
'appearance' => [
'createNewRelationLinkTitle' => 'LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:images.addFileReference',
'showPossibleLocalizationRecords' => true,
'showRemovedLocalizationRecords' => true,
'showAllLocalizationLink' => true,
'showSynchronizationLink' => true
],
'foreign_match_fields' => [
'fieldname' => 'images',
'tablenames' => 'sys_category',
'table_local' => 'sys_file',
],
'foreign_types' => array(
'0' => array(
'showitem' => '
--palette--;LLL:EXT:lang/locallang_tca.xlf:sys_file_reference.imageoverlayPalette;imageoverlayPalette,
--palette--;;filePalette'
),
\TYPO3\CMS\Core\Resource\File::FILETYPE_TEXT => array(
'showitem' => '
--palette--;LLL:EXT:lang/locallang_tca.xlf:sys_file_reference.imageoverlayPalette;imageoverlayPalette,
--palette--;;filePalette'
),
\TYPO3\CMS\Core\Resource\File::FILETYPE_IMAGE => array(
'showitem' => '
--palette--;LLL:EXT:lang/locallang_tca.xlf:sys_file_reference.imageoverlayPalette;imageoverlayPalette,
--palette--;;filePalette'
),
\TYPO3\CMS\Core\Resource\File::FILETYPE_AUDIO => array(
'showitem' => '
--palette--;LLL:EXT:lang/locallang_tca.xlf:sys_file_reference.imageoverlayPalette;imageoverlayPalette,
--palette--;;filePalette'
),
\TYPO3\CMS\Core\Resource\File::FILETYPE_VIDEO => array(
'showitem' => '
--palette--;LLL:EXT:lang/locallang_tca.xlf:sys_file_reference.imageoverlayPalette;imageoverlayPalette,
--palette--;;filePalette'
),
\TYPO3\CMS\Core\Resource\File::FILETYPE_APPLICATION => array(
'showitem' => '
--palette--;LLL:EXT:lang/locallang_tca.xlf:sys_file_reference.imageoverlayPalette;imageoverlayPalette,
--palette--;;filePalette'
)
),
],
$GLOBALS['TYPO3_CONF_VARS']['GFX']['imagefile_ext']
)
],
];
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns('sys_category', $newSysCategoryColumns);