Version: bijiben-40.1-7.fc39
Gnome Notes(bijiben) crashes as we try to launch it from GUI or cmdline.

e.g. from cmdline:
# bijiben

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: Error building template class 'BjbSelectionToolbar' for an instance of type 'BjbSelectionToolbar': .:2:1008 Invalid object type 'BjbColorButton'

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: Error building template class 'BjbMainToolbar' for an instance of type 'BjbMainToolbar': .:2:1018 Invalid object type 'BjbColorButton'

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_add_accelerator: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_add_accelerator: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): GLib-GObject-CRITICAL **: 15:56:17.621: g_object_bind_property_full: assertion 'G_IS_OBJECT (source)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_show: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_show: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_show: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_show: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_show: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_hide: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_hide: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_hide: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_hide: assertion 'GTK_IS_WIDGET (widget)' failed

(bijiben:10840): Gtk-CRITICAL **: 15:56:17.621: gtk_widget_hide: assertion 'GTK_IS_WIDGET (widget)' failed
**
ERROR:../src/bjb-main-toolbar.c:474:populate_bar_switch: assertion failed: (GTK_IS_BUTTON (self->color_button))
Bail out! ERROR:../src/bjb-main-toolbar.c:474:populate_bar_switch: assertion failed: (GTK_IS_BUTTON (self->color_button))
Aborted (core dumped)
#


Reproducible: Always

Steps to Reproduce:
1. Upgrade F38 to F39
2. Launch bijiben from cmdline.

Actual Results:  
bijiben crashes

Expected Results:  
bijiben should not crash