[epiphany] prefs-dialog: Set the default size

[Michael Catanzaro <mcatanzaro src gnome org>]

commit f68c0bba65d2c14622fe71f91dbad2f9cc144d73
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Mon Jun 24 23:17:35 2019 +0200

    prefs-dialog: Set the default size
    
    This makes sure the window isn't stupidly small by default.

 src/resources/gtk/prefs-dialog.ui | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/resources/gtk/prefs-dialog.ui b/src/resources/gtk/prefs-dialog.ui
index 990291e90..4f489e18c 100644
--- a/src/resources/gtk/prefs-dialog.ui
+++ b/src/resources/gtk/prefs-dialog.ui
@@ -8,6 +8,8 @@
     <property name="destroy-with-parent">True</property>
     <property name="icon-name">gtk-preferences</property>
     <property name="type-hint">dialog</property>
+    <property name="default-width">600</property>
+    <property name="default-height">800</property>
     <child internal-child="headerbar">
       <object class="GtkHeaderBar">
         <property name="title" translatable="yes">Preferences</property>