[gnome-control-center] printers: Don't use gtk_widget_show_all

[Robert Ancell <rancell src gnome org>]

commit 7f67f6b24f3f945f233d1e0387c6816dcc1a1123
Author: Robert Ancell <robert ancell canonical com>
Date:   Fri Nov 23 13:37:01 2018 +1300

    printers: Don't use gtk_widget_show_all
    
    It is removed in GTK+ 4

 panels/printers/pp-details-dialog.ui | 18 ++++++++++++++++++
 panels/printers/pp-printer-entry.c   |  2 +-
 2 files changed, 19 insertions(+), 1 deletion(-)
---
diff --git a/panels/printers/pp-details-dialog.ui b/panels/printers/pp-details-dialog.ui
index d4b7e342f..71f56fff8 100644
--- a/panels/printers/pp-details-dialog.ui
+++ b/panels/printers/pp-details-dialog.ui
@@ -27,14 +27,17 @@
     </child>
     <child internal-child="vbox">
       <object class="GtkBox">
+        <property name="visible">True</property>
         <property name="margin">20</property>
         <property name="halign">center</property>
         <child>
           <object class="GtkGrid">
+            <property name="visible">True</property>
             <property name="row-spacing">10</property>
             <property name="column-spacing">10</property>
             <child>
               <object class="GtkLabel">
+                <property name="visible">True</property>
                 <property name="label" translatable="yes">Name</property>
                 <property name="halign">end</property>
                 <property name="mnemonic_widget">printer_name_entry</property>
@@ -49,6 +52,7 @@
             </child>
             <child>
               <object class="GtkEntry" id="printer_name_entry">
+                <property name="visible">True</property>
                 <property name="halign">fill</property>
                 <property name="width_request">320</property>
                 <signal name="changed" handler="printer_name_changed"/>
@@ -61,6 +65,7 @@
 
             <child>
               <object class="GtkLabel">
+                <property name="visible">True</property>
                 <property name="label" translatable="yes">Location</property>
                 <property name="halign">end</property>
                 <property name="mnemonic_widget">printer_location_entry</property>
@@ -75,6 +80,7 @@
             </child>
             <child>
               <object class="GtkEntry" id="printer_location_entry">
+                <property name="visible">True</property>
                 <property name="width_request">320</property>
                 <property name="halign">fill</property>
               </object>
@@ -86,6 +92,7 @@
 
             <child>
               <object class="GtkLabel">
+                <property name="visible">True</property>
                 <property name="label" translatable="yes">Address</property>
                 <property name="halign">end</property>
                 <property name="mnemonic_widget">printer_address_label</property>
@@ -100,6 +107,7 @@
             </child>
             <child>
               <object class="GtkLabel" id="printer_address_label">
+                <property name="visible">True</property>
                 <property name="label">192.168.0.1</property>
                 <property name="halign">start</property>
               </object>
@@ -111,6 +119,7 @@
 
             <child>
               <object class="GtkLabel">
+                <property name="visible">True</property>
                 <property name="label" translatable="yes">Driver</property>
                 <property name="halign">end</property>
                 <property name="mnemonic_widget">printer_model_label</property>
@@ -125,9 +134,11 @@
             </child>
             <child>
               <object class="GtkStack" id="printer_model_stack">
+                <property name="visible">True</property>
                 <property name="halign">start</property>
                 <child>
                   <object class="GtkLabel" id="printer_model_label">
+                    <property name="visible">True</property>
                     <property name="halign">start</property>
                     <property name="label">HP Inkjet Delux 9000</property>
                     <property name="selectable">True</property>
@@ -138,16 +149,19 @@
                 </child>
                 <child>
                   <object class="GtkBox">
+                    <property name="visible">True</property>
                     <property name="halign">start</property>
                     <property name="spacing">5</property>
                     <child>
                       <object class="GtkSpinner">
+                        <property name="visible">True</property>
                         <property name="active">True</property>
                         <property name="halign">start</property>
                       </object>
                     </child>
                     <child>
                       <object class="GtkLabel">
+                        <property name="visible">True</property>
                         <property name="halign">start</property>
                         <property name="label" translatable="yes">Searching for preferred drivers…</property>
                       </object>
@@ -166,11 +180,13 @@
 
             <child>
               <object class="GtkButtonBox" id="driver_buttons">
+                <property name="visible">True</property>
                 <property name="orientation">vertical</property>
                 <property name="spacing">10</property>
                 <property name="halign">start</property>
                 <child>
                   <object class="GtkButton" id="search_for_drivers_button">
+                    <property name="visible">True</property>
                     <property name="label" translatable="yes">Search for Drivers</property>
                     <property name="halign">fill</property>
                     <signal name="clicked" handler="search_for_drivers"/>
@@ -179,6 +195,7 @@
 
                 <child>
                   <object class="GtkButton" id="select_from_database_button">
+                    <property name="visible">True</property>
                     <property name="label" translatable="yes">Select from Database…</property>
                     <property name="halign">fill</property>
                     <signal name="clicked" handler="select_ppd_in_dialog"/>
@@ -187,6 +204,7 @@
 
                 <child>
                   <object class="GtkButton" id="install_ppd_button">
+                    <property name="visible">True</property>
                     <property name="label" translatable="yes">Install PPD File…</property>
                     <property name="halign">fill</property>
                     <signal name="clicked" handler="select_ppd_manually"/>
diff --git a/panels/printers/pp-printer-entry.c b/panels/printers/pp-printer-entry.c
index c402dae3c..b0ffb0f7c 100644
--- a/panels/printers/pp-printer-entry.c
+++ b/panels/printers/pp-printer-entry.c
@@ -439,7 +439,7 @@ on_show_printer_details_dialog (GtkButton      *button,
 
   g_signal_connect (self->pp_details_dialog, "response", G_CALLBACK (details_dialog_cb), self);
   g_signal_connect (self->pp_details_dialog, "printer-renamed", G_CALLBACK (printer_renamed_cb), self);
-  gtk_widget_show_all (GTK_WIDGET (self->pp_details_dialog));
+  gtk_widget_show (GTK_WIDGET (self->pp_details_dialog));
 }
 
 static void