From f4509547db01d1de820679177640d38b7e1b577b Mon Sep 17 00:00:00 2001
From: jmontoyaa <gugli100@gmail.com>
Date: Fri, 2 Jun 2017 12:56:49 +0200
Subject: [PATCH] Fix update stylesheet see #1998

---
 main/inc/lib/display.lib.php  |  1 +
 main/inc/lib/template.lib.php | 11 +++++------
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/main/inc/lib/display.lib.php b/main/inc/lib/display.lib.php
index 6b11aa36bf..e4dcdd691d 100755
--- a/main/inc/lib/display.lib.php
+++ b/main/inc/lib/display.lib.php
@@ -87,6 +87,7 @@ class Display
 
         if (!empty(self::$preview_style)) {
             self::$global_template->preview_theme = self::$preview_style;
+            self::$global_template->set_system_parameters();
             self::$global_template->setCssFiles();
             self::$global_template->set_js_files();
             self::$global_template->setCssCustomFiles();
diff --git a/main/inc/lib/template.lib.php b/main/inc/lib/template.lib.php
index f2c5ebca88..2042f356ea 100755
--- a/main/inc/lib/template.lib.php
+++ b/main/inc/lib/template.lib.php
@@ -526,9 +526,13 @@ class Template
     /**
      * Set system parameters
      */
-    private function set_system_parameters()
+    public function set_system_parameters()
     {
         $this->theme = api_get_visual_theme();
+        if (!empty($this->preview_theme)) {
+            $this->theme = $this->preview_theme;
+        }
+
         $this->themeDir = self::getThemeDir($this->theme);
 
         // Setting app paths/URLs
@@ -573,11 +577,6 @@ class Template
     {
         global $disable_js_and_css_files;
         $css = array();
-        $this->theme = api_get_visual_theme();
-
-        if (!empty($this->preview_theme)) {
-            $this->theme = $this->preview_theme;
-        }
 
         // Default CSS Bootstrap
         $bowerCSSFiles = [