Enigma: Fix compatibility with assets_dir

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Enigma: Fix compatibility with assets_dir
 - Fix bug where comment notation within style tag would cause the whole style to be ignored (#5747)
 - Fix bug where it wasn't possible to scroll folders list in Edge (#5750)
 - Fix addressbook searching by gender (#5757)

plugins/enigma/lib/enigma_ui.php

@@ -116,14 +116,12 @@ class enigma_ui
      */
     function add_css()
     {
-        if ($this->css_loaded)
+        if ($this->css_loaded) {
             return;
+        }
 
         $skin_path = $this->enigma->local_skin_path();
-        if (is_file($this->home . "/$skin_path/enigma.css")) {
         $this->enigma->include_stylesheet("$skin_path/enigma.css");
-        }
-
         $this->css_loaded = true;
     }
 
@@ -185,17 +183,7 @@ class enigma_ui
      */
     function tpl_key_frame($attrib)
     {
-        if (!$attrib['id']) {
+        return $this->rc->output->frame($attrib, true);
-            $attrib['id'] = 'rcmkeysframe';
-        }
-
-        $attrib['name'] = $attrib['id'];
-
-        $this->rc->output->set_env('contentframe', $attrib['name']);
-        $this->rc->output->set_env('blankpage', $attrib['src'] ?
-            $this->rc->output->abs_url($attrib['src']) : 'program/resources/blank.gif');
-
-        return $this->rc->output->frame($attrib);
     }
 
     /**