Fix LanguageCtrl hints on wxMSW.

The change in 30d1adb broke wxMSW for a change.

src/languagectrl.cpp

@@ -41,8 +41,12 @@ void LanguageCtrl::Init(Language lang)
 {
     SetHint(_("Language Code or Name (e.g. en_GB)"));
 
+    // wxGTK must have the value set before autocompletion to avoid annoying
+    // popups in some (hard to determine) cases.
+#ifdef __WXGTK__
     if (lang.IsValid())
         SetValue(lang.FormatForRoundtrip());
+#endif
 
 #ifdef __WXOSX__
     for (auto x: Language::AllFormattedNames())
@@ -61,6 +65,12 @@ void LanguageCtrl::Init(Language lang)
 #endif
 
     m_inited = true;
+
+    // ...but wxMSW requires the opposite, otherwise the text wouldn't appear.
+#ifndef __WXGTK__
+    if (lang.IsValid())
+        SetValue(lang.FormatForRoundtrip());
+#endif
 }
 
 void LanguageCtrl::SetLang(const Language& lang)