[Checkins] [zopefoundation/DocumentTemplate] 612683: No longer use icons which got deleted in Zope 4.

[GitHub]

  Branch: refs/heads/fix-icons
  Home:   https://github.com/zopefoundation/DocumentTemplate
  Commit: 6126830cd0d98c619b8433fcf4c205f4cd202785
      https://github.com/zopefoundation/DocumentTemplate/commit/6126830cd0d98c619b8433fcf4c205f4cd202785
  Author: Michael Howitz <mh at gocept.com>
  Date:   2018-02-02 (Fri, 02 Feb 2018)

  Changed paths:
    M CHANGES.rst
    M src/TreeDisplay/TreeTag.py

  Log Message:
  -----------
  No longer use icons which got deleted in Zope 4.

Prevent Chrome from rendering the images as broken.