[fractal] media_viewer: Remove GtkAlignment

[Daniel Garcia Moreno <danigm src gnome org>]

commit 4839d9d1fe5679a77d5826c1573f962b4aeace14
Author: Christopher Davis <brainblasted disroot org>
Date:   Sat Oct 31 17:48:19 2020 -0700

    media_viewer: Remove GtkAlignment
    
    GtkAlignment is deprecated and no longer used
    in GTK4

 fractal-gtk/res/ui/media_viewer.ui | 68 ++++++++++++++++----------------------
 1 file changed, 28 insertions(+), 40 deletions(-)
---
diff --git a/fractal-gtk/res/ui/media_viewer.ui b/fractal-gtk/res/ui/media_viewer.ui
index 799b2260..e56915c0 100644
--- a/fractal-gtk/res/ui/media_viewer.ui
+++ b/fractal-gtk/res/ui/media_viewer.ui
@@ -121,31 +121,25 @@
                 <property name="transition_type">crossfade</property>
                 <property name="reveal_child">True</property>
                 <child>
-                  <object class="GtkAlignment">
+                  <object class="GtkButton" id="previous_media_button">
                     <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="left_padding">18</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">True</property>
+                    <property name="halign">center</property>
+                    <property name="valign">center</property>
+                    <property name="relief">half</property>
+                    <property name="margin_start">18</property>
                     <child>
-                      <object class="GtkButton" id="previous_media_button">
+                      <object class="GtkImage">
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">True</property>
-                        <property name="halign">center</property>
-                        <property name="valign">center</property>
-                        <property name="relief">half</property>
-                        <child>
-                          <object class="GtkImage">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="icon_name">go-previous-symbolic</property>
-                          </object>
-                        </child>
-                        <style>
-                          <class name="osd"/>
-                          <class name="round-button"/>
-                        </style>
+                        <property name="can_focus">False</property>
+                        <property name="icon_name">go-previous-symbolic</property>
                       </object>
                     </child>
+                    <style>
+                      <class name="osd"/>
+                      <class name="round-button"/>
+                    </style>
                   </object>
                 </child>
               </object>
@@ -168,31 +162,25 @@
                 <property name="transition_type">crossfade</property>
                 <property name="reveal_child">True</property>
                 <child>
-                  <object class="GtkAlignment">
+                  <object class="GtkButton" id="next_media_button">
                     <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="right_padding">18</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">True</property>
+                    <property name="halign">center</property>
+                    <property name="valign">center</property>
+                    <property name="relief">half</property>
+                    <property name="margin_end">18</property>
                     <child>
-                      <object class="GtkButton" id="next_media_button">
+                      <object class="GtkImage">
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">True</property>
-                        <property name="halign">center</property>
-                        <property name="valign">center</property>
-                        <property name="relief">half</property>
-                        <child>
-                          <object class="GtkImage">
-                            <property name="visible">True</property>
-                            <property name="can_focus">False</property>
-                            <property name="icon_name">go-next-symbolic</property>
-                          </object>
-                        </child>
-                        <style>
-                          <class name="osd"/>
-                          <class name="round-button"/>
-                        </style>
+                        <property name="can_focus">False</property>
+                        <property name="icon_name">go-next-symbolic</property>
                       </object>
                     </child>
+                    <style>
+                      <class name="osd"/>
+                      <class name="round-button"/>
+                    </style>
                   </object>
                 </child>
               </object>