move version dropdown to seperate file and add Foxy

Author: Alex

_themes/sphinx_rtd_theme/layout.html

@@ -102,6 +102,7 @@
           <img src="{{ pathto('_static/logo.png', 1) }}"/>
         </a>
 
+        {% include "version_dropdown.html" %}
         {% include "searchbox.html" %}
 
         {% endblock %}

_themes/sphinx_rtd_theme/version_dropdown.html

@@ -0,0 +1,12 @@
+<div class="version">
+    <div class="version-dropdown">
+        <lable for="version-list">Version:</lable>
+    <select class="version-list" id="version-list" onchange="this.options[this.selectedIndex].value && (window.location = this.options[this.selectedIndex].value);">
+        <option value="http://moveit2_tutorials.picknik.ai">Moveit 2 - Foxy</option>
+        <option value="http://ros-planning.github.io/moveit_tutorials/">MoveIt 1 - Noetic</option>
+        <option value="" selected>MoveIt 1 - Melodic</option>
+        <option value="http://docs.ros.org/en/kinetic/api/moveit_tutorials/html/index.html">MoveIt 1 - Kinetic</option>
+        <option value="http://docs.ros.org/en/indigo/api/moveit_tutorials/html/index.html">MoveIt 1 - Indigo (EOL)</option>
+    </select>
+    </div>
+</div><br>