Index: applications/editors/josm/plugins/flatlaf/src/org/openstreetmap/josm/plugins/flatlaf/FlatLaf.properties
===================================================================
--- applications/editors/josm/plugins/flatlaf/src/org/openstreetmap/josm/plugins/flatlaf/FlatLaf.properties	(revision 35701)
+++ applications/editors/josm/plugins/flatlaf/src/org/openstreetmap/josm/plugins/flatlaf/FlatLaf.properties	(revision 35734)
@@ -8,2 +8,4 @@
 
 MenuItem.checkMargins = 3,3,3,3
+
+TitlePane.unifiedBackground = true