feature #23625 Feature #23583 Add current and fallback locales in WDT / Profiler (nemoneph)

This PR was merged into the 3.4 branch.

Discussion
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Feature #23583  Add current and fallback locales in WDT / Profiler

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      |  no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #23583
| License       | MIT
| Doc PR        | -

The goal of this PR is to add informations about the locale and the fallback locales in the translation WDT panel / and profiler

Commits
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98a8a6c735 Feature #23583  Add current and fallback locales in WDT / Profiler

Author: fabpot

DataCollector/TranslationDataCollector.php

@@ -45,6 +45,9 @@ public function lateCollect()
         $this->data = $this->computeCount($messages);
         $this->data['messages'] = $messages;
 
+        $this->data['locale'] = $this->translator->getLocale();
+        $this->data['fallback_locales'] = $this->translator->getFallbackLocales();
+
         $this->data = $this->cloneVar($this->data);
     }
 
@@ -87,6 +90,16 @@ public function getCountDefines()
         return isset($this->data[DataCollectorTranslator::MESSAGE_DEFINED]) ? $this->data[DataCollectorTranslator::MESSAGE_DEFINED] : 0;
     }
 
+    public function getLocale()
+    {
+        return !empty($this->data['locale']) ? $this->data['locale'] : null;
+    }
+
+    public function getFallbackLocales()
+    {
+        return (isset($this->data['fallback_locales']) && count($this->data['fallback_locales']) > 0) ? $this->data['fallback_locales'] : array();
+    }
+
     /**
      * {@inheritdoc}
      */