From 9da0af453388aa6882c61ca343f989b14fd459bf Mon Sep 17 00:00:00 2001
From: Alexander Shapoval <popcornphp@gmail.com>
Date: Sun, 16 Sep 2018 19:51:00 +0300
Subject: [PATCH] Add ability to specify one CSS class to apply to all tab
 panels (#3761)

Credit to @ebashu-on-holidays
---
 modules/backend/assets/less/layout/layout.less | 2 +-
 modules/backend/classes/FormTabs.php           | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/modules/backend/assets/less/layout/layout.less b/modules/backend/assets/less/layout/layout.less
index 4d5ad5fff..bb2f686eb 100644
--- a/modules/backend/assets/less/layout/layout.less
+++ b/modules/backend/assets/less/layout/layout.less
@@ -125,7 +125,7 @@ body {
     display: table;
     table-layout: fixed;
     height: 100%;
-    width: 100%;
+    min-width: 100%;
 
     > .layout-row {
         display: table-row;
diff --git a/modules/backend/classes/FormTabs.php b/modules/backend/classes/FormTabs.php
index ea755a55e..d9eb012e1 100644
--- a/modules/backend/classes/FormTabs.php
+++ b/modules/backend/classes/FormTabs.php
@@ -182,6 +182,10 @@ class FormTabs implements IteratorAggregate, ArrayAccess
      */
     public function getPaneCssClass($index = null, $label = null)
     {
+        if (is_string($this->paneCssClass)) {
+            return $this->paneCssClass;
+        }
+
         if ($index !== null && isset($this->paneCssClass[$index])) {
             return $this->paneCssClass[$index];
         }