Chat channel options

A couple of points about the chat channel windows:

  1. The chat channel names can get long and the number of channels large. Allow user to relabel the tabs as they choose.
  2. Depending on the graphics settings (specifically, when optimized for performance) the ability to turn of transparency in chat windows may not work. At a minimum, I believe shading needs to be medium. Two things to change:
    a. fix the problem by having ALL windows NOT be transparent without the graphics settings being set to handle the choice.
    b. include a more easily findable notice about how to set the settings to work.
    c. change the optimized for performance settings to the minimums that result in a usable screen - meaning, that transparency can be turned off.