Fix language dropdown not shown in translated Getting Started pages

Author: exoego

_config.yml

@@ -37,6 +37,12 @@ collections:
     permalink: /:collection/:path.html
   books:
     output: false
+  getting-started-intellij-track:
+    output: true
+    permalink: /:collection/:path.html
+  getting-started-sbt-track:
+    output: true
+    permalink: /:collection/:path.html
   ja: # Japanese translations
     output: true
     permalink: /:collection/:path.html

getting-started-intellij-track/building-a-scala-project-with-intellij-and-sbt.md renamed to _getting-started-intellij-track/building-a-scala-project-with-intellij-and-sbt.md

@@ -15,7 +15,7 @@ <h5 class="contents">Contents</h5>
       </ul>
       {% elsif page.language %}
          {% assign engPath = page.id | remove_first: "/" | remove_first: page.language | append: '.html' %}
-         {% assign engPg = site.overviews | where: 'partof', page.partof | first %}
+         {% assign engPg = site.documents | where: 'partof', page.partof | first %}
         <ul id="available-languages" style="display: none;">
           <li><a href="{{ site.baseurl }}{{ engPath }}">English</a></li>
           {% for l in engPg.languages %}

getting-started-intellij-track/getting-started-with-scala-in-intellij.md renamed to _getting-started-intellij-track/getting-started-with-scala-in-intellij.md

@@ -44,8 +44,8 @@ If you prefer using a text editor like emacs, Vim, Atom, or Sublime Text, then
 the best way to compile, test, and run Scala code is using _sbt_, Scala's build
 tool.
 
-* [Getting Started with Scala and sbt on the Command Line](getting-started-sbt-track/getting-started-with-scala-and-sbt-on-the-command-line.html)
-* [Testing Scala with sbt and ScalaTest on the Command Line](getting-started-sbt-track/testing-scala-with-sbt-on-the-command-line.html)
+* [Getting Started with Scala and sbt on the Command Line](_getting-started-sbt-track/getting-started-with-scala-and-sbt-on-the-command-line.html)
+* [Testing Scala with sbt and ScalaTest on the Command Line](_getting-started-sbt-track/testing-scala-with-sbt-on-the-command-line.html)
 
 <!-- sbt is the easiest way to ensure that your Scala project is reproducible;
 you specify a Scala version, any libraries you depend on, and sbt takes care of