[eog-plugins] export-to-folder: Fix spacing to be more like eog's dialogs

[Felix Riemann <friemann src gnome org>]

commit 49ecb7b051700bebaef23250f44d580befdcd1d2
Author: Felix Riemann <friemann gnome org>
Date:   Sun Dec 29 00:45:33 2019 +0100

    export-to-folder: Fix spacing to be more like eog's dialogs
    
    eog commonly uses 12px spacing in its dialogs, not 10.

 plugins/export-to-folder/preferences_dialog.ui | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)
---
diff --git a/plugins/export-to-folder/preferences_dialog.ui b/plugins/export-to-folder/preferences_dialog.ui
index fd02f83..319e629 100644
--- a/plugins/export-to-folder/preferences_dialog.ui
+++ b/plugins/export-to-folder/preferences_dialog.ui
@@ -1,17 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.16.0 -->
+<!-- Generated with glade 3.22.1 -->
 <interface>
-  <requires lib="gtk+" version="3.0"/>
+  <requires lib="gtk+" version="3.14"/>
   <object class="GtkBox" id="preferences_box">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
-    <property name="halign">start</property>
     <property name="valign">start</property>
-    <property name="margin_left">10</property>
-    <property name="margin_right">10</property>
-    <property name="margin_top">10</property>
-    <property name="margin_bottom">10</property>
-    <property name="spacing">10</property>
+    <property name="border_width">12</property>
+    <property name="spacing">12</property>
     <child>
       <object class="GtkLabel" id="export_dir_label">
         <property name="visible">True</property>