[gnome-boxes] wizard-source: Style the Downloadable subrows

[Felipe Borges <felipeborges src gnome org>]

commit 4824e3b1cfe8a9b6d578b6824f79a6a9c55350b1
Author: Felipe Borges <felipeborges gnome org>
Date:   Mon Nov 27 11:52:32 2017 +0100

    wizard-source: Style the Downloadable subrows
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790614

 data/gtk-style.css     |    4 ++++
 src/wizard-source.vala |    3 +++
 2 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/data/gtk-style.css b/data/gtk-style.css
index 4c4cd96..72e80d7 100644
--- a/data/gtk-style.css
+++ b/data/gtk-style.css
@@ -84,6 +84,10 @@
     background-color: @theme_bg_color;
 }
 
+.boxes-menu-subrow {
+    padding: 10px;
+}
+
 
 /* Adds a border to the ISOs lists top undershoot */
 .boxes-menu-scrolled.undershoot.top { border-top: 1px solid @borders; }
diff --git a/src/wizard-source.vala b/src/wizard-source.vala
index 96136f7..c85f880 100644
--- a/src/wizard-source.vala
+++ b/src/wizard-source.vala
@@ -68,6 +68,9 @@ private class Boxes.WizardDownloadableMediaEntry : Gtk.ListBoxRow {
         label.halign = Gtk.Align.START;
 
         add (label);
+
+        this.get_style_context ().add_class ("boxes-menu-row");
+        this.get_style_context ().add_class ("boxes-menu-subrow");
     }
 }