From d8a331fda0bca674b710d041ed4c9350c6017aad Mon Sep 17 00:00:00 2001
From: Joseph Lenox <lenox.joseph@gmail.com>
Date: Tue, 2 Jan 2018 14:03:21 -0600
Subject: [PATCH] Re-added original on_change hook back onto the optgroup that
 contained the extruders so that the state of has_heatbed is correctly
 updated.

Fixes #4249
---
 lib/Slic3r/GUI/PresetEditor.pm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/Slic3r/GUI/PresetEditor.pm b/lib/Slic3r/GUI/PresetEditor.pm
index 8df829342..5e5603271 100644
--- a/lib/Slic3r/GUI/PresetEditor.pm
+++ b/lib/Slic3r/GUI/PresetEditor.pm
@@ -1273,6 +1273,10 @@ sub build {
                     wxTheApp->CallAfter(sub {
                         $self->_extruders_count_changed($optgroup->get_value('extruders_count'));
                     });
+                } else {
+                    wxTheApp->CallAfter(sub {
+                        $self->_on_value_change($opt_id);
+                    });
                 }
             });
         }