I18n: Add missing translation strings (#4424)

Closes issue 3120

locales/en-US.json

@@ -1,4 +1,9 @@
 {
+    "Add to playlist": "Add to playlist",
+    "Add to playlist: ": "Add to playlist: ",
+    "Answer": "Answer",
+    "Search for videos": "Search for videos",
+    "The Popular feed has been disabled by the administrator.": "The Popular feed has been disabled by the administrator.",
     "generic_channels_count": "{{count}} channel",
     "generic_channels_count_plural": "{{count}} channels",
     "generic_views_count": "{{count}} view",

src/invidious/frontend/comments_reddit.cr

@@ -33,7 +33,7 @@ module Invidious::Frontend::Comments
             <a href="javascript:void(0)" data-onclick="toggle_parent">[ − ]</a>
             <b><a href="https://www.reddit.com/user/#{child.author}">#{child.author}</a></b>
             #{translate_count(locale, "comments_points_count", child.score, NumberFormatting::Separator)}
-            <span title="#{child.created_utc.to_s(translate(locale, "%a %B %-d %T %Y UTC"))}">#{translate(locale, "`x` ago", recode_date(child.created_utc, locale))}</span>
+            <span title="#{child.created_utc.to_s("%a %B %-d %T %Y UTC")}">#{translate(locale, "`x` ago", recode_date(child.created_utc, locale))}</span>
             <a href="https://www.reddit.com#{child.permalink}" title="#{translate(locale, "permalink")}">#{translate(locale, "permalink")}</a>
             </p>
             <div>