Add dates column to actor/browse, fixes #4444

Squashed commit of the following:

commit 7cf3a5739bc839f158d40722e0746cbd6c0207c4
Author: José Raddaoui Marín <raddaouimarin@gmail.com>
Date:   Sat Dec 22 16:11:29 2012 +0100

    Add dates of existence on actors browse list