Merge branch '4.4' into 5.0

* 4.4:
  Add missing use statements
  [Translation] Add missing use statement
  [Translation] Add missing use statement
  [Config][XmlReferenceDumper] Prevent potential \TypeError
  [Mailer] Fix broken mandrill http send for recipients with names
  [Translation] prefer intl domain when adding messages to catalogue
  Fix CS
  Fix CS
  Fail on empty password verification (without warning on any implementation)
  [Translation][Debug] Add installation and minimal example to README
  [Validator] try to call __get method if property is uninitialized
  Show both missing packages in the same error message
  Fix handling of empty_data's \Closure value in Date/Time form types

Author: fabpot

Mime/NotificationEmail.php

@@ -41,12 +41,17 @@ class NotificationEmail extends TemplatedEmail
 
     public function __construct(Headers $headers = null, AbstractPart $body = null)
     {
+        $missingPackages = [];
         if (!class_exists(CssInlinerExtension::class)) {
-            throw new \LogicException(sprintf('You cannot use "%s" if the CSS Inliner Twig extension is not available; try running "composer require twig/cssinliner-extra".', static::class));
+            $missingPackages['twig/cssinliner-extra'] = ' CSS Inliner';
         }
 
         if (!class_exists(InkyExtension::class)) {
-            throw new \LogicException(sprintf('You cannot use "%s" if the Inky Twig extension is not available; try running "composer require twig/inky-extra".', static::class));
+            $missingPackages['twig/inky-extra'] = 'Inky';
+        }
+
+        if ($missingPackages) {
+            throw new \LogicException(sprintf('You cannot use "%s" if the %s Twig extension%s not available; try running "composer require %s".', static::class, implode(' and ', $missingPackages), \count($missingPackages) > 1 ? 's are' : ' is', implode(' ', array_keys($missingPackages))));
         }
 
         parent::__construct($headers, $body);