FIX:fixed gradient filament color display on MacOS

Change-Id: I57f3243f5013b8d26ace3fae2cc41e807494af6b

src/slic3r/GUI/StatusPanel.cpp

@@ -3430,6 +3430,7 @@ void StatusPanel::on_sys_color_changed()
     m_bitmap_speed_active.msw_rescale();
     m_switch_speed->SetImages(m_bitmap_speed, m_bitmap_speed);
     m_ams_control->msw_rescale();
+    if (m_filament_setting_dlg) {m_filament_setting_dlg->msw_rescale();}
     rescale_camera_icons();
 }