gui, man, authors: Update docs, translations, and contributors

gui/default/assets/lang/lang-ja.json

@@ -128,6 +128,7 @@
     "Error": "エラー",
     "External File Versioning": "外部バージョン管理",
     "Failed Items": "失敗した項目",
+    "Failed to load file versions.": "Failed to load file versions.",
     "Failed to load ignore patterns.": "Failed to load ignore patterns.",
     "Failed to setup, retrying": "Failed to setup, retrying",
     "Failure to connect to IPv6 servers is expected if there is no IPv6 connectivity.": "お使いのネットワークがIPv6を利用していない場合、IPv6のサーバーへの接続に失敗しても異常ではありません。",
@@ -373,6 +374,7 @@
     "The rate limit must be a non-negative number (0: no limit)": "帯域制限値は0以上で指定して下さい。 (0で無制限)",
     "The rescan interval must be a non-negative number of seconds.": "再スキャン間隔は0秒以上で指定してください。",
     "There are no devices to share this folder with.": "どのデバイスともフォルダーを共有していません。",
+    "There are no file versions to restore.": "There are no file versions to restore.",
     "There are no folders to share with this device.": "There are no folders to share with this device.",
     "They are retried automatically and will be synced when the error is resolved.": "エラーが解決すると、自動的に再試行され同期されます。",
     "This Device": "このデバイス",