Horizon formula fix
diff --git a/horizon/files/local_settings/liberty_settings.py b/horizon/files/local_settings/liberty_settings.py
index ee616b8..1e01ea7 100644
--- a/horizon/files/local_settings/liberty_settings.py
+++ b/horizon/files/local_settings/liberty_settings.py
@@ -32,7 +32,11 @@
{%- if app.theme is defined %}
CUSTOM_THEME_PATH = 'themes/{{ app.theme }}'
{%- elif app.plugin.horizon_theme.theme_name is defined %}
-CUSTOM_THEME_PATH = 'themes/{{ app.plugin.horizon_theme.theme_name }}'
+# Enable custom theme if it is present.
+try:
+ from horizon_custom_theme import *
+except ImportError:
+ pass
{%- endif %}
{%- endif %}