Use outline attributes for focus to avoid custom attributes

Custom attributes are deprecated, slow, and are causing problems with gtk 3.10.
Adwaita is using the same hack for some time now [1]. This patch is a bit
more hacky in that it hard codes the a fill color.

[1] https://git.gnome.org/browse/gnome-themes-standard/commit/?id=6e641cf46cc70ce770482b3fc331b1fa3cd7af2b
Use outline attributes for focus to avoid custom attributes
  
Custom attributes are deprecated, slow, and are causing problems with gtk 3.10. Adwaita is using the same hack for some time now [1]. This patch is a bit more hacky in that it hard codes the a fill color.
  
[1] https://git.gnome.org/browse/gnome-themes-standard/commit/?id=6e641cf46cc70ce770482b3fc331b1fa3cd7af2b. Fixes: https://bugs.launchpad.net/bugs/1018718.

Approved by Andrea Cimitan, PS Jenkins bot.
Releasing 1.0.3+14.04.20140109-0ubuntu1, based on r151
Releasing 1.0.3+14.04.20140109-0ubuntu1 (revision 151 from lp:unico).

Approved by PS Jenkins bot.