Tested with 1.9.4 - found no other / related / new issues due to this change of the z-index.

Fixes: https://github.com/osTicket/osTicket-1.8/issues/980
Fixes: https://github.com/osTicket/osTicket-1.8/issues/1411

Fixes #980

And use admin-defined site logo

Change thread entry title bar to use more flexible layout using div's and
span's in hopes of avoiding unnecessary wrapping -- especially in the poster
name column..

And also fix font display for <pre> sections created from plain/text thread
posts

Fixes oversize image display to be resized in both the ticket thread and
the redactor editor in (at least)

  * Ticket-view boxes
  * Client new-ticket form
  * Staff new ticket
  * Page add/edit
  * FAQ add/edit
  * Canned response add/edit

Fixes osTicket/osTicket-1.8#247

Previously list items rendered outside the thread-body table cell

Fix width of the ticket thread body
Add consistent font styling between Redactor and thread body