[gimp] themes: Add a bit of padding around treeview header column icons

[Stanislav Grinkov <sgrinkov src gnome org>]

commit 65fcda3b70181e2eb307dc08c525c56eb4c59d30
Author: Stanislav Grinkov <43956-stanislavgrinkov users noreply gitlab gnome org>
Date:   Mon Feb 14 18:35:51 2022 +0600

    themes: Add a bit of padding around treeview header column icons

 themes/System/gimp.css | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/themes/System/gimp.css b/themes/System/gimp.css
index 4728ed0608..8bdcba1066 100644
--- a/themes/System/gimp.css
+++ b/themes/System/gimp.css
@@ -132,6 +132,10 @@ entry.italic {
     color: rgba (1.0, 0.0, 0.0, 1.0);
 }
 
+treeview header button {
+    padding: 6px;
+}
+
 treeview .toggle-icon:not(.visible):hover {
     border: 1px solid gray;
     border-radius: 3px;