[FIX] 0045966: Error when editing footer group Legal Information

# Conflicts:
#	components/ILIAS/GlobalScreen/classes/UI/Footer/Entries/EntriesTable.php
#	components/ILIAS/GlobalScreen/classes/UI/Footer/Groups/GroupsTable.php

Author: chfsx

components/ILIAS/GlobalScreen/classes/UI/Footer/Entries/EntriesTable.php

@@ -67,7 +67,15 @@ public function getRows(OrderingRowBuilder $row_builder, array $visible_column_i
         $nok = $this->pons->out()->nok();
 
         foreach ($this->repository->allForParent($this->group->getId()) as $entry) {
-            $title = $this->translations_repository->get($entry)->getDefault()?->getTranslation() ?? $entry->getTitle();
+            if ($entry->isCore()) {
+                $title = $this->collector->getSingleItemFromRaw(
+                    $this->identification->fromSerializedIdentification($entry->getId()),
+                )?->getTitle() ?? 'Unknown';
+            } else {
+                $title = $this->translations_repository->get($entry)->getDefault()?->getTranslation(
+                ) ?? $entry->getTitle();
+            }
+
             $row = $row_builder->buildOrderingRow(
                 $this->hash($entry->getId()),
                 [

components/ILIAS/GlobalScreen/classes/UI/Footer/Groups/GroupsTable.php

@@ -78,7 +78,7 @@ public function getRows(OrderingRowBuilder $row_builder, array $visible_column_i
             if ($group->isCore()) {
                 $title = $this->collector->getSingleItemFromRaw(
                     $this->identification->fromSerializedIdentification($group->getId()),
-                )?->getTitle()??'';
+                )?->getTitle() ?? 'Unknown';
             } else {
                 $title = $this->translations_repository->get($group)->getDefault()?->getTranslation(
                 ) ?? $group->getTitle();

components/ILIAS/GlobalScreen/src/Scope/Footer/Collector/FooterMainCollector.php

@@ -172,15 +172,15 @@ public function hasVisibleItems(): bool
     /**
      * @deprecated
      */
-    public function getSingleItemFromFilter(IdentificationInterface $identification): isItem
+    public function getSingleItemFromFilter(IdentificationInterface $identification): ?isItem
     {
         return $this->map->getSingleItemFromFilter($identification);
     }
 
     /**
      * @deprecated
      */
-    public function getSingleItemFromRaw(IdentificationInterface $identification): isItem
+    public function getSingleItemFromRaw(IdentificationInterface $identification): ?isItem
     {
         return $this->map->getSingleItemFromRaw($identification);
     }