[gnome-music] Remove remaining gtk deprecation warnings

[Vadim Rutkovsky <vrutkovsky src gnome org>]

commit 6d7f8f1d0b3c70d17564133f1e0d392994e22b90
Author: Kris Thomsen <mail kristhomsen dk>
Date:   Mon Sep 22 22:37:11 2014 +0200

    Remove remaining gtk deprecation warnings
    
    https://bugzilla.gnome.org/show_bug.cgi?id=737142

 data/ArtistAlbumWidget.ui  |    5 +++--
 data/ArtistAlbumsWidget.ui |    4 ++--
 data/PlaylistControls.ui   |    6 +++---
 3 files changed, 8 insertions(+), 7 deletions(-)
---
diff --git a/data/ArtistAlbumWidget.ui b/data/ArtistAlbumWidget.ui
index 51c4c4f..e9ac427 100644
--- a/data/ArtistAlbumWidget.ui
+++ b/data/ArtistAlbumWidget.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <!-- interface-requires gtk+ 3.6 -->
+  <!-- interface-requires gtk+ 3.12 -->
   <object class="GtkBox" id="ArtistAlbumWidget">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
@@ -35,7 +35,8 @@
                 <property name="can_focus">False</property>
                 <property name="xalign">0</property>
                 <property name="yalign">0</property>
-                <property name="xpad">6</property>
+                <property name="margin_start">6</property>
+                <property name="margin_end">6</property>
                 <property name="ellipsize">middle</property>
                 <style>
                   <class name="title"/>
diff --git a/data/ArtistAlbumsWidget.ui b/data/ArtistAlbumsWidget.ui
index a4c9072..3c525af 100644
--- a/data/ArtistAlbumsWidget.ui
+++ b/data/ArtistAlbumsWidget.ui
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <!-- interface-requires gtk+ 3.6 -->
+  <!-- interface-requires gtk+ 3.12 -->
   <object class="GtkBox" id="ArtistAlbumsWidget">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
-    <property name="margin_left">24</property>
+    <property name="margin_start">24</property>
     <property name="margin_top">18</property>
     <property name="orientation">vertical</property>
     <child>
diff --git a/data/PlaylistControls.ui b/data/PlaylistControls.ui
index cbf6e9d..bc6a564 100644
--- a/data/PlaylistControls.ui
+++ b/data/PlaylistControls.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <!-- interface-requires gtk+ 3.10 -->
+  <!-- interface-requires gtk+ 3.12 -->
   <object class="GtkMenu" id="menu1">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
@@ -25,8 +25,8 @@
   <object class="GtkGrid" id="grid">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
-    <property name="margin_left">18</property>
-    <property name="margin_right">24</property>
+    <property name="margin_start">18</property>
+    <property name="margin_end">24</property>
     <property name="margin_top">18</property>
     <property name="margin_bottom">18</property>
     <child>