[chronojump] dialog_about now shows correctly the scrolledwin bars without problems inside viewport

[Xavier de Blas <xaviblas src gnome org>]

commit 089d617280a47a5d266b711069ced7b0389acb39
Author: Xavier de Blas <xaviblas gmail com>
Date:   Sat Sep 12 23:13:59 2020 +0200

    dialog_about now shows correctly the scrolledwin bars without problems inside viewport

 glade/dialog_about.glade | 4 +---
 src/gui/about.cs         | 1 +
 2 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/glade/dialog_about.glade b/glade/dialog_about.glade
index 4e52c8ca..e845a253 100644
--- a/glade/dialog_about.glade
+++ b/glade/dialog_about.glade
@@ -3,9 +3,7 @@
   <!-- interface-requires gtk+ 3.0 -->
   <!-- interface-naming-policy toplevel-contextual -->
   <widget class="GtkDialog" id="dialog_about">
-    <property name="width_request">500</property>
-    <property name="height_request">550</property>
-    <property name="visible">True</property>
+    <property name="height_request">500</property>
     <property name="can_focus">False</property>
     <property name="border_width">10</property>
     <property name="title" translatable="yes">About</property>
diff --git a/src/gui/about.cs b/src/gui/about.cs
index 02348ab7..97c1ce39 100644
--- a/src/gui/about.cs
+++ b/src/gui/about.cs
@@ -89,6 +89,7 @@ public class About
                        paragraph = "\n";
                }
                dialog_about_label_documenters.Text = docsString;
+               dialog_about.Show();
        }
 
        private void textLabel(string [] text, Gtk.Label label) {