[gnome-control-center] keyboard: Add margins between sections, like other panels

[Robert Ancell <rancell src gnome org>]

commit f1e8f9b364d9e1ca3528320e9a96ddbcaa50e083
Author: Ian Douglas Scott <idscott system76 com>
Date:   Fri Jul 24 11:03:15 2020 -0700

    keyboard: Add margins between sections, like other panels

 panels/keyboard/cc-keyboard-panel.ui | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/panels/keyboard/cc-keyboard-panel.ui b/panels/keyboard/cc-keyboard-panel.ui
index c182d0c92..0e7873d40 100644
--- a/panels/keyboard/cc-keyboard-panel.ui
+++ b/panels/keyboard/cc-keyboard-panel.ui
@@ -50,6 +50,7 @@
                   <object class="GtkFrame">
                     <property name="visible">True</property>
                     <property name="can_focus">False</property>
+                    <property name="margin_bottom">20</property>
                     <child>
                       <object class="CcInputListBox" id="input_list">
                         <property name="visible">True</property>
@@ -72,6 +73,7 @@
                   <object class="GtkFrame">
                     <property name="visible">True</property>
                     <property name="can_focus">False</property>
+                    <property name="margin_bottom">20</property>
                     <child>
                       <object class="GtkListBox" id="input_source_list">
                         <property name="visible">True</property>
@@ -147,6 +149,7 @@
                   <object class="GtkFrame">
                     <property name="visible">True</property>
                     <property name="can_focus">False</property>
+                    <property name="margin_bottom">20</property>
                     <child>
                       <object class="GtkListBox" id="special_chars_list">
                         <property name="visible">True</property>