MDL-56192 theme_bootstrapbase: Properly display theme_boost default tab

theme/bootstrapbase/templates/theme_boost/admin_setting_tabs.mustache

@@ -0,0 +1,31 @@
+{{!
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+<ul class="nav nav-tabs">
+    {{#tabs}}
+        <li class="{{#active}}active{{/active}}">
+            <a href="#{{name}}" data-toggle="tab" role="tab">{{displayname}}</a>
+        </li>
+    {{/tabs}}
+</ul>
+<div class="tab-content">
+    {{#tabs}}
+        <div class="tab-pane {{#active}}active{{/active}}" id="{{name}}" role="tabpanel">
+            {{{html}}}
+        </div>
+    {{/tabs}}
+</div>
+