Add duration parameter to muting. (#13831)

* Adding duration to muting.

* Remove useless checks

app/javascript/mastodon/locales/en.json

@@ -276,6 +276,8 @@
   "missing_indicator.label": "Not found",
   "missing_indicator.sublabel": "This resource could not be found",
   "mute_modal.hide_notifications": "Hide notifications from this user?",
+  "mute_modal.duration": "Duration",
+  "mute_modal.indefinite": "Indefinite",
   "navigation_bar.apps": "Mobile apps",
   "navigation_bar.blocks": "Blocked users",
   "navigation_bar.bookmarks": "Bookmarks",

app/javascript/mastodon/locales/ja.json

@@ -268,6 +268,8 @@
   "missing_indicator.label": "見つかりません",
   "missing_indicator.sublabel": "見つかりませんでした",
   "mute_modal.hide_notifications": "このユーザーからの通知を隠しますか？",
+  "mute_modal.duration": "ミュートする期間",
+  "mute_modal.indefinite": "無期限",
   "navigation_bar.apps": "アプリ",
   "navigation_bar.blocks": "ブロックしたユーザー",
   "navigation_bar.bookmarks": "ブックマーク",