[geary: 1/2] Show drag & drop feedback dropping message on folder

[Michael Gratton <mjog src gnome org>]

commit 357bef45e77a5a69e4ec27e4fabd3176e11d72b8
Author: Chris Heywood <15127-creywood users noreply gitlab gnome org>
Date:   Mon Apr 19 10:16:07 2021 +0930

    Show drag & drop feedback dropping message on folder
    
    Fixes regression resulting from !401

 ui/geary.css | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/ui/geary.css b/ui/geary.css
index 1455e30ff..6bae621f6 100644
--- a/ui/geary.css
+++ b/ui/geary.css
@@ -420,8 +420,8 @@ treeview.sidebar .cell:dir(rtl) {
 treeview.sidebar:drop(active).after,
 treeview.sidebar:drop(active).before,
 treeview.sidebar:drop(active).into {
-  border-top-style: solid;
-  border-bottom-style: solid;
+  border-top: 1px solid @borders;
+  border-bottom: 1px solid @borders;
 }
 
 /* Inspector */