Fix custom column style

css/post-expiration.css

+/* Columns */
+.fixed .column-expiration_date {
+    width: 10%;
+}

rrze-post-expiration.php

@@ -2,7 +2,7 @@
 /*
   Plugin Name: RRZE Post Expiration
   Plugin URI: https://gitlab.rrze.fau.de/rrze-webteam/rrze-post-expiration
-  Version: 1.1.0
+  Version: 1.1.1
   Description: Verfallsdatum für Beiträge.
   Author: RRZE-Webteam
   License: GPLv2 or later
@@ -35,7 +35,7 @@ class RRZE_Post_Expiration {
     const option_name = '_rrze_post_expiration';
     
     const php_version = '5.4';
-    const wp_version = '4.4';
+    const wp_version = '4.5';
     
     private static $instance = NULL;
 
@@ -51,6 +51,8 @@ class RRZE_Post_Expiration {
     private function __construct() {
         global $current_blog;
 
+        add_action('admin_enqueue_scripts', array(__CLASS__, 'enqueue_scripts'));
+        
         add_filter('manage_post_posts_columns', array(__CLASS__, 'expiration_date_column'));
         add_action('manage_post_posts_custom_column', array(__CLASS__, 'expiration_date_custom_column'), 10, 2);
         add_filter('manage_edit-post_sortable_columns', array(__CLASS__, 'expiration_date_sortable_column'));
@@ -88,6 +90,10 @@ class RRZE_Post_Expiration {
         }
     }
 
+    public static function enqueue_scripts() {
+        wp_enqueue_style('post-expiration', plugins_url('css/post-expiration.css', __FILE__ ), 'all', NULL);
+    }
+    
     public static function expiration_date_column($columns) {
         $columns['expiration_date'] = __('Verfallsdatum', 'rrze-post-expiration');
         return $columns;