[glade/glade-3-8] Gtk plugin: add GtkCellRendererText::underline missing displayable values

[Juan Pablo Ugarte <jpu src gnome org>]

commit e2c63f987e2f8a31fd5bb726c3a37371ada8d918
Author: Juan Pablo Ugarte <juanpablougarte gmail com>
Date:   Wed Sep 23 12:06:09 2020 -0300

    Gtk plugin: add GtkCellRendererText::underline missing displayable values

 plugins/gtk+/gtk+.xml.in | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/plugins/gtk+/gtk+.xml.in b/plugins/gtk+/gtk+.xml.in
index f82d6154..f4605db6 100644
--- a/plugins/gtk+/gtk+.xml.in
+++ b/plugins/gtk+/gtk+.xml.in
@@ -2818,6 +2818,9 @@ embedded in another object</_tooltip>
            <value id="PANGO_UNDERLINE_DOUBLE" _name="Double"/>
            <value id="PANGO_UNDERLINE_LOW" _name="Low"/>
            <value id="PANGO_UNDERLINE_ERROR" _name="Error"/>
+           <value id="PANGO_UNDERLINE_SINGLE_LINE" _name="Single Line"/>
+           <value id="PANGO_UNDERLINE_DOUBLE_LINE" _name="Double Line"/>
+           <value id="PANGO_UNDERLINE_ERROR_LINE" _name="Error Line"/>
          </displayable-values>
        </property>
         <property id="attr-underline" _name="Underline column" save="False" default="-1" 
custom-layout="True">