[gnome-taquin] Behavior on focus. Credit in About dialog.

[Arnaud Bonatti <arnaudb src gnome org>]

commit 7d43f2d3819398bb952393bd164ee6e3f0714372
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Fri Dec 26 20:16:33 2014 +0100

    Behavior on focus. Credit in About dialog.

 data/taquin.css      |   16 ++++++++++------
 data/taquin.ui       |    1 -
 src/taquin-main.vala |    9 ++++++++-
 3 files changed, 18 insertions(+), 8 deletions(-)
---
diff --git a/data/taquin.css b/data/taquin.css
index e94574d..6324116 100644
--- a/data/taquin.css
+++ b/data/taquin.css
@@ -8,21 +8,25 @@ GtkApplicationWindow GtkRadioButton {
 GtkApplicationWindow GtkRadioButton:checked {
     background-color:shade(#ededed, 0.85);
 }
-GtkApplicationWindow GtkMenuButton:hover,
-GtkApplicationWindow GtkMenuButton:checked {
+GtkApplicationWindow GtkMenuButton:checked,
+GtkApplicationWindow GtkMenuButton:focused,
+GtkApplicationWindow GtkMenuButton:prelight {
     background:-gtk-gradient (radial, center center, 0, center center, 0.5, from(white), to(#e8e8e8));
 }
-GtkApplicationWindow GtkMenuButton:hover:backdrop,
-GtkApplicationWindow GtkMenuButton:checked:backdrop {
+GtkApplicationWindow GtkMenuButton:checked:backdrop,
+GtkApplicationWindow GtkMenuButton:focused:backdrop,
+GtkApplicationWindow GtkMenuButton:prelight:backdrop {
     background:-gtk-gradient (radial, center center, 0, center center, 0.5, from(white), 
to(@theme_bg_color));
 }
-GtkApplicationWindow GtkMenuButton:hover,
 GtkApplicationWindow GtkMenuButton:checked,
+GtkApplicationWindow GtkMenuButton:focused,
+GtkApplicationWindow GtkMenuButton:prelight,
 GtkApplicationWindow GtkRadioButton:checked {
     color:shade(#2e3436, 0.85);
 }
-GtkApplicationWindow GtkMenuButton:hover:backdrop,
 GtkApplicationWindow GtkMenuButton:checked:backdrop,
+GtkApplicationWindow GtkMenuButton:focused:backdrop,
+GtkApplicationWindow GtkMenuButton:prelight:backdrop,
 GtkApplicationWindow GtkRadioButton:checked:backdrop {
     color:@theme_unfocused_fg_color;
 }
diff --git a/data/taquin.ui b/data/taquin.ui
index c461267..c23582d 100644
--- a/data/taquin.ui
+++ b/data/taquin.ui
@@ -50,7 +50,6 @@
     <child type="titlebar">
       <object class="GtkHeaderBar" id="headerbar">
         <property name="visible">True</property>
-        <property name="can-focus">False</property>
         <property name="show-close-button">True</property>
         <property name="title" translatable="yes">Taquin</property>
         <child>
diff --git a/src/taquin-main.vala b/src/taquin-main.vala
index 2f1e659..9b513b0 100644
--- a/src/taquin-main.vala
+++ b/src/taquin-main.vala
@@ -296,7 +296,6 @@ public class Taquin : Gtk.Application
         back_button.hide ();
         start_game ();
         undo_button.show ();
-        view.grab_focus ();
     }
 
     /*\
@@ -343,6 +342,13 @@ public class Taquin : Gtk.Application
     private void about_cb ()
     {
         string[] authors = { "Arnaud Bonatti", null };
+        string[] artists = { "Ola Einang (Flickr)",
+                             "Ruskis (Wikimedia)",
+                             "Alvesgaspar (Wikimedia)",
+                             "Mark J. Sebastian (Flickr)",
+                             "Mueller-rech.muenchen (Wikimedia)",
+                             "(see COPYING.themes for informations)",
+                             null };
         string[] documenters = { "Arnaud Bonatti", null };
         show_about_dialog (window,
                            "name", _("Taquin"),
@@ -351,6 +357,7 @@ public class Taquin : Gtk.Application
                            "license-type", License.GPL_3_0,
                            "comments", _("A classic 15-puzzle game"),
                            "authors", authors,
+                           "artists", artists,
                            "documenters", documenters,
                            "translator-credits", _("translator-credits"),
                            "logo-icon-name", "gnome-taquin",