alarm-row: Remove GtkBox

Uses valign in all buttons, instead of using GtkBox

src/gui/event-editor/gcal-alarm-row.ui

@@ -1,12 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
   <template class="GcalAlarmRow" parent="AdwActionRow">
-    <child>
-      <object class="GtkBox">
-        <property name="valign">center</property>
-        <property name="spacing">6</property>
     <child>
       <object class="GtkToggleButton" id="volume_button">
+        <property name="valign">center</property>
         <property name="icon-name">audio-volume-high-symbolic</property>
         <property name="tooltip-text" translatable="yes">Toggles the sound of the alarm</property>
         <signal name="notify::active" handler="on_sound_toggle_changed_cb" object="GcalAlarmRow" swapped="no" />
@@ -17,6 +14,7 @@
     </child>
     <child>
       <object class="GtkButton" id="remove_button">
+        <property name="valign">center</property>
         <property name="icon-name">edit-delete-symbolic</property>
         <property name="tooltip-text" translatable="yes">Remove the alarm</property>
         <signal name="clicked" handler="on_remove_button_clicked_cb" object="GcalAlarmRow" swapped="no" />
@@ -25,7 +23,5 @@
         </style>
       </object>
     </child>
-      </object>
-    </child>
   </template>
 </interface>