[evolution] Bug 794648 - Undo/Redo doesn't work in component Description

[Milan Crha <mcrha src gnome org>]

commit 60ad1e7d3a7d3a580fb05d4c5057a39bf11df0b0
Author: Milan Crha <mcrha redhat com>
Date:   Tue Apr 3 12:09:53 2018 +0200

    Bug 794648 - Undo/Redo doesn't work in component Description

 src/calendar/gui/e-comp-editor-property-part.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/src/calendar/gui/e-comp-editor-property-part.c b/src/calendar/gui/e-comp-editor-property-part.c
index ae6a734..aafe74e 100644
--- a/src/calendar/gui/e-comp-editor-property-part.c
+++ b/src/calendar/gui/e-comp-editor-property-part.c
@@ -552,8 +552,12 @@ e_comp_editor_property_part_string_attach_focus_tracker (ECompEditorPropertyPart
        g_return_if_fail (E_IS_FOCUS_TRACKER (focus_tracker));
 
        edit_widget = e_comp_editor_property_part_get_edit_widget (E_COMP_EDITOR_PROPERTY_PART (part_string));
-       if (edit_widget)
-               e_widget_undo_attach (edit_widget, focus_tracker);
+       if (edit_widget) {
+               if (GTK_IS_SCROLLED_WINDOW (edit_widget))
+                       e_widget_undo_attach (gtk_bin_get_child (GTK_BIN (edit_widget)), focus_tracker);
+               else
+                       e_widget_undo_attach (edit_widget, focus_tracker);
+       }
 }
 
 void