made new comment thread captions configurable

Author: Oaphi

app/views/comments/_new_thread_modal.html.erb

@@ -13,10 +13,10 @@
     <b>Start a new comment thread</b>
   </div>
   <div class="modal--body">
-    <% if post.comment_threads.size > 0 %>
-      <p>You can create a new comment thread. Please check first whether an existing comment thread covers already what you need.</p>
+    <% if post.comment_threads.any? %>
+      <p><%= t('comments.captions.new_thread_on_post') %></p>
     <% else %>
-      <p>Be the first to create a new comment thread.</p>
+      <p><%= t('comments.captions.first_thread_on_post') %></p>
     <% end %>
 
     <%= form_tag create_comment_thread_path do %>

config/locales/strings/en.comments.yml

@@ -1,5 +1,10 @@
 en:
   comments:
+    captions:
+      first_thread_on_post: >
+        Be the first to create a new comment thread.
+      new_thread_on_post: >
+        Please check if an existing comment thread already covers what you need first.
     errors:
       disabled_on_archived_threads: >
         Archived threads cannot be replied to.