Changed references to Weekly Highlights Emails in UI elements. 'Learn More' link…

Changed references to Weekly Highlights Emails in UI elements. 'Learn More' link in studio opens in new tab.

cms/static/js/views/modals/course_outline_modals.js

@@ -270,7 +270,7 @@ define(['jquery', 'backbone', 'underscore', 'gettext', 'js/views/baseview',
         },
 
         getTitle: function() {
-            return gettext('Enable Weekly Course Highlight Messages');
+            return gettext('Enable Weekly Highlight Emails');
         },
 
         getIntroductionMessage: function() {

cms/templates/js/course-highlights-enable.underscore

@@ -8,5 +8,5 @@
 <% } else { %>
   <button class="status-highlights-enabled-value button" aria-labelledby="highlights-enabled-label"><%- gettext('Enable Now') %></button>
 <% } %>
-<a class="status-highlights-enabled-info" href="<%- highlights_doc_url %>">Learn more</a>
+<a class="status-highlights-enabled-info" href="<%- highlights_doc_url %>" target="_blank">Learn more</a>
 </div>

cms/templates/js/highlights-enable-editor.underscore

 <p>
 <%- gettext(
-    'When you enable weekly course highlight messages, learners ' +
+    'When you enable weekly highlight emails, learners ' +
     'automatically receive weekly email messages for each section that ' +
     'has highlights. You cannot disable highlights after you start ' +
     'sending them.'
@@ -10,7 +10,7 @@
 <% // xss-lint: disable=underscore-not-escaped %>
 <%= edx.HtmlUtils.interpolateHtml(
     gettext(
-        'Are you sure you want to enable weekly course highlight messages? '
+        'Are you sure you want to enable weekly highlight emails? '
         + '{linkStart}Learn more.{linkEnd}'
     ),
     {