[gnome-todo] Update to new GTK4 properties

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 4c171995704de250e48bfcbb50dda79c1cb97eb3
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sun Apr 26 13:54:21 2020 -0300

    Update to new GTK4 properties

 src/gtd-plugin-dialog.ui                    | 5 +----
 src/notification/gtd-notification-widget.ui | 3 +--
 2 files changed, 2 insertions(+), 6 deletions(-)
---
diff --git a/src/gtd-plugin-dialog.ui b/src/gtd-plugin-dialog.ui
index 750638e..8d70fff 100644
--- a/src/gtd-plugin-dialog.ui
+++ b/src/gtd-plugin-dialog.ui
@@ -24,7 +24,6 @@
                     <property name="propagate_natural_width">1</property>
                     <child>
                       <object class="GtkViewport">
-                        <property name="shadow_type">none</property>
                         <child>
                           <object class="GtkListBox" id="listbox">
                             <property name="selection_mode">none</property>
@@ -43,9 +42,7 @@
               <object class="GtkStackPage">
                 <property name="name">config</property>
                 <property name="child">
-                  <object class="GtkFrame" id="frame">
-                    <property name="shadow_type">none</property>
-                  </object>
+                  <object class="GtkFrame" id="frame" />
                 </property>
               </object>
             </child>
diff --git a/src/notification/gtd-notification-widget.ui b/src/notification/gtd-notification-widget.ui
index 6f53f5b..92957c3 100644
--- a/src/notification/gtd-notification-widget.ui
+++ b/src/notification/gtd-notification-widget.ui
@@ -12,7 +12,6 @@
         </child>
         <child>
           <object class="GtkFrame" id="frame">
-            <property name="shadow_type">none</property>
             <child>
               <object class="GtkBox" id="box">
                 <property name="spacing">12</property>
@@ -42,7 +41,7 @@
                   <object class="GtkButton" id="close_button">
                     <property name="can_focus">1</property>
                     <property name="receives_default">1</property>
-                    <property name="relief">none</property>
+                    <property name="has-frame">false</property>
                     <property name="icon-name">window-close-symbolic</property>
                     <signal name="clicked" handler="on_close_button_clicked_cb" 
object="GtdNotificationWidget" swapped="yes"/>
                   </object>