[gnome-control-center] mouse: Tweak header spacing

[Bastien Nocera <hadess src gnome org>]

commit f872293465352d5b6e1df8ac193bb48cadd3fbd8
Author: Allan Day <allanpday gmail com>
Date:   Wed Oct 28 11:49:49 2015 +0000

    mouse: Tweak header spacing
    
    There was slightly too much padding between the headings and the
    list boxes below.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=756863

 panels/mouse/gnome-mouse-properties.ui |   15 ++++++---------
 1 files changed, 6 insertions(+), 9 deletions(-)
---
diff --git a/panels/mouse/gnome-mouse-properties.ui b/panels/mouse/gnome-mouse-properties.ui
index 3493655..c4e3da7 100644
--- a/panels/mouse/gnome-mouse-properties.ui
+++ b/panels/mouse/gnome-mouse-properties.ui
@@ -45,7 +45,6 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="xalign">0</property>
-                <property name="margin_start">3</property>
                 <property name="label" translatable="yes">General</property>
                 <attributes>
                   <attribute name="weight" value="bold"/>
@@ -57,8 +56,8 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="shadow_type">in</property>
-                <property name="margin_top">12</property>
-                <property name="margin_bottom">12</property>
+                <property name="margin_top">6</property>
+                <property name="margin_bottom">6</property>
                 <property name="shadow_type">in</property>
                 <child>
                   <object class="GtkListBox" id="general-listbox">
@@ -170,7 +169,6 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="xalign">0</property>
-                <property name="margin_start">3</property>
                 <property name="label" translatable="yes">Mouse</property>
                 <attributes>
                   <attribute name="weight" value="bold"/>
@@ -182,8 +180,8 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="shadow_type">in</property>
-                <property name="margin_top">12</property>
-                <property name="margin_bottom">12</property>
+                <property name="margin_top">6</property>
+                <property name="margin_bottom">6</property>
                 <property name="shadow_type">in</property>
                 <child>
                   <object class="GtkListBox" id="mouse-listbox">
@@ -307,7 +305,6 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="xalign">0</property>
-                <property name="margin_start">3</property>
                 <property name="label" translatable="yes">Touchpad</property>
                 <attributes>
                   <attribute name="weight" value="bold"/>
@@ -319,8 +316,8 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="shadow_type">in</property>
-                <property name="margin_top">12</property>
-                <property name="margin_bottom">12</property>
+                <property name="margin_top">6</property>
+                <property name="margin_bottom">6</property>
                 <property name="shadow_type">in</property>
                 <child>
                   <object class="GtkBox" id="touchpad-box">