Window titles should be shortened in the launcher context menu

--- Steps to reproduce ---

1.) Open up an application with a long window title (e.g. head to http://www.reddit.com/r/AskHistorians/comments/15mmq8/odd_request_on_very_specific_information_im/ with Google Chrome)
2.) Display the context menu by right-clicking on the appropriate launcher

--- Bug description ---

Window titles are displayed in their entire length when right clicking on a launcher. With long window titles this makes the context menu extend over the whole length of the monitor (see screenshot 1)

--- Current behaviour ---

Window titles are displayed in their entire length.

--- Expected behaviour ---

Window titles should be shortened (see screenshot 2 for how window managers like openbox handle this).

--- Additional Information ---

$apt-cache policy plank
plank:
  Installed: 0.2.0~bzr718+dnd376-0ubuntu1~12.04~ricotz1
  Candidate: 0.2.0~bzr718+dnd376-0ubuntu1~12.04~ricotz1
  Version table:
 *** 0.2.0~bzr718+dnd376-0ubuntu1~12.04~ricotz1 0
        500 http://ppa.launchpad.net/ricotz/docky/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status

$ lsb_release -rd
Description: Ubuntu 12.04.1 LTS
Release: 12.04

$ apt-cache policy openbox
openbox:
  Installed: 3.5.0-2ubuntu2-bugfix
  Candidate: 3.5.0-2ubuntu2-bugfix
  Version table:
 *** 3.5.0-2ubuntu2-bugfix 0
        100 /var/lib/dpkg/status
     3.5.0-2ubuntu2 0
        500 http://ftp-stud.hs-esslingen.de/ubuntu/ precise/universe amd64 Packages