Merge pull request #5 from jklymak/fix-native2

FIX: fix navbar native again

Author: jklymak

mpl_sphinx_theme/mpl_nav_bar.html

@@ -1,5 +1,4 @@
-
-{% if theme_native_site %}
+{% if theme_native_site == "True" %}
 <ul id="navbar-main-elements" class="navbar-nav">
   <li class="nav-item">
     <a class="reference internal nav-link" href="{{ pathto('plot_types/index') }}">Plot types</a>