I18n: Update translation ja (100%).

95 translated messages.

Transifex (https://explore.transifex.com/xfce/).

po/ja.po

@@ -119,7 +119,7 @@ msgstr "ここに検索フレーズを入力してください"
 #. Insert empty menu item
 #: ../panel-plugin/xfce4-clipman-history.c:303 ../panel-plugin/menu.c:431
 msgid "History is empty"
-msgstr ""
+msgstr "履歴は空です"
 
 #: ../panel-plugin/xfce4-clipman-history.c:385
 #, c-format
@@ -418,7 +418,7 @@ msgstr "履歴のクリア(_C)"
 
 #: ../panel-plugin/menu.c:453
 msgid "_Clear clipboard"
-msgstr ""
+msgstr "クリップボードをクリア(_C)"
 
 #: ../panel-plugin/menu.c:499
 msgid "Could not generate QR-Code."