From efc009f724590862e3c64d425aba24c9452f3a99 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adomas=20Ven=C4=8Dkauskas?= <adomas.ven@gmail.com>
Date: Fri, 23 Apr 2021 11:37:49 +0300
Subject: [PATCH] Fix collection tree header alignment on macOS

---
 chrome/content/zotero/collectionTree.jsx | 7 ++++++-
 scss/mac/_virtualized-table.scss         | 4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/chrome/content/zotero/collectionTree.jsx b/chrome/content/zotero/collectionTree.jsx
index 527a7a2117..4e359c0b63 100644
--- a/chrome/content/zotero/collectionTree.jsx
+++ b/chrome/content/zotero/collectionTree.jsx
@@ -294,7 +294,12 @@ var CollectionTree = class CollectionTree extends LibraryTree {
 		let twisty;
 		if (this.isContainerEmpty(index)) {
 			twisty = document.createElementNS("http://www.w3.org/1999/xhtml", 'span');
-			twisty.classList.add("spacer-twisty");
+			if (Zotero.isMac && treeRow.isHeader) {
+				twisty.classList.add("spacer-header");
+			}
+			else {
+				twisty.classList.add("spacer-twisty");
+			}
 		}
 		else {
 			twisty = getDOMIcon("IconTwisty");
diff --git a/scss/mac/_virtualized-table.scss b/scss/mac/_virtualized-table.scss
index 9ffc98232b..78e62e899a 100644
--- a/scss/mac/_virtualized-table.scss
+++ b/scss/mac/_virtualized-table.scss
@@ -15,6 +15,10 @@
 	.spacer-twisty {
 		min-width: 19px;
 	}
+  
+	.spacer-header {
+		min-width: 6px;
+	}
 }
 
 .virtualized-table-body, .drag-image-container{