GtkAppChooserDialog: Simplify ui template

gtk/ui/gtkappchooserdialog.ui

@@ -2,19 +2,15 @@
 <interface domain="gtk30">
   <!-- interface-requires gtk+ 3.10 -->
   <template class="GtkAppChooserDialog" parent="GtkDialog">
-    <property name="can_focus">False</property>
-    <property name="border_width">0</property>
     <property name="title" translatable="yes">Select Application</property>
     <property name="type_hint">dialog</property>
     <child internal-child="vbox">
       <object class="GtkBox" id="dialog-vbox1">
-        <property name="can_focus">False</property>
         <property name="orientation">vertical</property>
         <property name="spacing">2</property>
         <child>
           <object class="GtkSearchBar" id="search_bar">
             <property name="visible">True</property>
-            <property name="border_width">0</property>
             <child>
               <object class="GtkSearchEntry" id="search_entry">
                 <property name="visible">True</property>
@@ -23,21 +19,12 @@
               </object>
             </child>
           </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="pack_type">start</property>
-            <property name="position">0</property>
-          </packing>
         </child>
         <child internal-child="action_area">
           <object class="GtkButtonBox" id="dialog-action_area1">
-            <property name="can_focus">False</property>
             <property name="layout_style">end</property>
           </object>
           <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
             <property name="pack_type">end</property>
             <property name="position">1</property>
           </packing>
@@ -45,13 +32,11 @@
         <child>
           <object class="GtkBox" id="inner_box">
             <property name="visible">True</property>
-            <property name="can_focus">False</property>
             <property name="orientation">vertical</property>
             <property name="spacing">6</property>
             <child>
               <object class="GtkLabel" id="label">
                 <property name="visible">True</property>
-                <property name="can_focus">False</property>
                 <property name="halign">center</property>
                 <property name="valign">center</property>
                 <property name="label">label</property>
@@ -59,14 +44,11 @@
               </object>
               <packing>
                 <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="position">0</property>
               </packing>
             </child>
           </object>
           <packing>
             <property name="expand">True</property>
-            <property name="fill">True</property>
             <property name="position">2</property>
           </packing>
         </child>