Show header information of the gedcom file on the side panel (#252)

* Show header information of the gedcom file on the side panel #251

* Format creation date in HEAD section

src/translations/bg.json

@@ -129,6 +129,7 @@
   "config.sex": "Пол",
   "config.sex.HIDE": "Скриване",
   "config.sex.SHOW": "Показване",
+  "head.source": "Източник на данни",
   "name.unknown_name": "Неизвестно име",
   "extras.images": "Изображение",
   "extras.notes": "Бележки",

src/translations/cs.json

@@ -129,6 +129,7 @@
   "config.sex": "Pohlaví",
   "config.sex.HIDE": "skrýt",
   "config.sex.SHOW": "zobrazit",
+  "head.source": "Zdroj dat",
   "name.unknown_name": "N.N.",
   "extras.images": "Obrázky",
   "extras.notes": "Poznámky",

src/translations/de.json

@@ -129,6 +129,7 @@
   "config.sex": "Geschlecht",
   "config.sex.HIDE": "verbergen",
   "config.sex.SHOW": "anzeigen",
+  "head.source": "Datenquelle",
   "name.unknown_name": "N.N.",
   "extras.images": "Bilder",
   "extras.notes": "Notizen",

src/translations/fr.json

@@ -129,6 +129,7 @@
   "config.sex": "Sexe",
   "config.sex.HIDE": "cacher",
   "config.sex.SHOW": "afficher",
+  "head.source": "Source de données",
   "name.unknown_name": "?",
   "extras.images": "Images",
   "extras.notes": "Notes",

src/translations/it.json

@@ -129,6 +129,7 @@
   "config.sex": "Sesso",
   "config.sex.HIDE": "nascondere",
   "config.sex.SHOW": "visualizzare",
+  "head.source": "Origine dati",
   "name.unknown_name": "N.N.",
   "extras.images": "Immagini",
   "extras.notes": "Appunti",

src/translations/pl.json

@@ -128,7 +128,8 @@
   "config.ids.SHOW": "pokaż",
   "config.sex": "Płeć",
   "config.sex.HIDE": "ukryj",
-  "config.sex.SHOW": "pokaż",      
+  "config.sex.SHOW": "pokaż",    
+  "head.source": "Źródło danych",  
   "name.unknown_name": "N.N.",
   "extras.images": "Zdjęcia",
   "extras.notes": "Notatki",

src/translations/ru.json

@@ -129,6 +129,7 @@
   "config.sex": "Пол",
   "config.sex.HIDE": "Скрыть",
   "config.sex.SHOW": "Показать",
+  "head.source": "Источник данных",  
   "name.unknown_name": "Неизвестно",
   "extras.images": "Картинки",
   "extras.notes": "Примечание",