[5.4] Fix field groups menu item type (joomla#46070)

Author: SniperSister

administrator/components/com_fields/src/Field/ComponentsFieldgroupField.php

@@ -94,10 +94,10 @@ protected function getOptions()
                 if ($c instanceof FieldsServiceInterface) {
                     $contexts = $c->getContexts();
 
-                    foreach ($contexts as $context) {
+                    foreach ($contexts as $contextKey => $contextName) {
                         $newOption        = new \stdClass();
-                        $newOption->value = strtolower($component->value . '.' . $context);
-                        $newOption->text  = $component->text . ' - ' . Text::_($context);
+                        $newOption->value = $contextKey;
+                        $newOption->text  = $component->text . ' - ' . Text::_($contextName);
                         $options[]        = $newOption;
                     }
                 } else {

administrator/components/com_fields/tmpl/groups/default.xml

@@ -8,7 +8,7 @@
 	<fieldset name="request">
 		<fields name="request">
 			<field
-				name="extension"
+				name="context"
 				type="ComponentsFieldgroup"
 				label="COM_FIELDS_CHOOSE_CONTEXT_LABEL"
 				required="true"