Merge lp:~knocte/ubuntu-themes/bring-back-zebra-striping into lp:ubuntu-themes

[Andres G. Aragoneses]

Ambiance: support zebra striping for treeviews

This is a rework of Andrea's patch (committed in r220:
http://bazaar.launchpad.net/~ubuntu-art-pkg/ubuntu-themes/trunk/revision/220)
that doesn't introduce a visual glitch on progress bars
inside treeviews (because of this visual glitch, the
r220 patch was reverted in r234:
http://bazaar.launchpad.net/~ubuntu-art-pkg/ubuntu-themes/trunk/revision/234
and bug LP#945430 had to be reopened), and therefore
allows us to have a theme that implements zebra
striping treeviews when applications choose to use
them via `self.treeview.set_rules_hint(True)` API.

Ambiance: support zebra striping for treeviews

This is a rework of Andrea's patch (committed in r220:
http://bazaar.launchpad.net/~ubuntu-art-pkg/ubuntu-themes/trunk/revision/220)
that doesn't introduce a visual glitch on progress bars
inside treeviews (because of this visual glitch, the
r220 patch was reverted in r234:
http://bazaar.launchpad.net/~ubuntu-art-pkg/ubuntu-themes/trunk/revision/234
and bug LP#945430 had to be reopened), and therefore
allows us to have a theme that implements zebra
striping treeviews when applications choose to use
them via `self.treeview.set_rules_hint(True)` API.

[Andrea Cimitan (cimi)]

review: Approve

[PS Jenkins bot (ps-jenkins)]

review: Approve (continuous-integration)

=== modified file 'Ambiance/gtk-3.0/gtk-widgets.css'
--- Ambiance/gtk-3.0/gtk-widgets.css	2013-11-25 16:46:01 +0000
+++ Ambiance/gtk-3.0/gtk-widgets.css	2014-01-03 19:16:53 +0000
@@ -1280,7 +1280,8 @@
 .progressbar row,
 .progressbar row:hover,
 .progressbar row:selected,
-.progressbar row:selected:focused {
+.progressbar row:selected:focused,
+.progressbar row:nth-child(odd) {
     border-radius: 8px;
     border-width: 0px;
     background-image: none;
@@ -2391,7 +2392,8 @@
 }
 
 GtkTreeView row:nth-child(odd) {
-    /*background-color: shade (@base_color, 0.965);*/
+    /* zebra stripping, see LP#945430 */
+    background-color: shade (@base_color, 0.965);
 }
 
 /************