From 2ccdfda6767a5da7b1af9f96c9ed7555136ba4f6 Mon Sep 17 00:00:00 2001
From: Ken Aoki <ken3574.25@gmail.com>
Date: Sat, 26 Dec 2020 05:13:20 +0000
Subject: [PATCH] Fix horizontal scrollbar not to disappear

Signed-off-by: Ken Aoki <ken3574.25@gmail.com>
---
 packages/core/src/browser/style/tabs.css | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/core/src/browser/style/tabs.css b/packages/core/src/browser/style/tabs.css
index 2d94ce03e271e..699e8efb3be8c 100644
--- a/packages/core/src/browser/style/tabs.css
+++ b/packages/core/src/browser/style/tabs.css
@@ -335,6 +335,7 @@ body.theia-editor-highlightModifiedTabs
 .p-TabBar-content-container {
   display: flex;
   flex: 1;
+  position: relative; /* This is necessary for perfect-scrollbar */
 }
 
 .p-TabBar-toolbar .item {