Index: trunk/src/org/openstreetmap/josm/gui/dialogs/properties/PropertiesDialog.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/dialogs/properties/PropertiesDialog.java	(revision 5384)
+++ trunk/src/org/openstreetmap/josm/gui/dialogs/properties/PropertiesDialog.java	(revision 5385)
@@ -491,5 +491,5 @@
         p.add(new JLabel("<html>"+trn("This will change up to {0} object.",
                 "This will change up to {0} objects.", sel.size(),sel.size())
-                +"<br><br>"+tr("Please select a key")), GBC.eol());
+                +"<br><br>"+tr("Please select a key")), GBC.eol().fill(GBC.HORIZONTAL));
         final AutoCompletingComboBox keys = new AutoCompletingComboBox();
         AutoCompletionManager autocomplete = Main.main.getEditLayer().data.getAutoCompletionManager();
