[Checkins] [zopefoundation/Zope] a849b6: Issue 29 (#583)

[drfho]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Zope
  Commit: a849b60f7c8065d46eeb46fe573b8aad09b27b72
      https://github.com/zopefoundation/Zope/commit/a849b60f7c8065d46eeb46fe573b8aad09b27b72
  Author: drfho <dr.frank.hoffmann at web.de>
  Date:   2019-05-03 (Fri, 03 May 2019)

  Changed paths:
    M src/zmi/styles/resources/zmi_base.css
    M src/zmi/styles/resources/zmi_base.js

  Log Message:
  -----------
  Issue 29 (#583)

* ZMI usability: ZMI root link, monotonized tab interface controls

* css typo

* Toggle long error alerts

* generalized alert height handling

* Alert box: added chevron icon for expanding box