[Checkins] [zopefoundation/Zope] 28cc28: Toggle long error alerts

[drfho]

  Branch: refs/heads/issue_29
  Home:   https://github.com/zopefoundation/Zope
  Commit: 28cc2853030cc5fb1e602fc46b12227e218d66ef
      https://github.com/zopefoundation/Zope/commit/28cc2853030cc5fb1e602fc46b12227e218d66ef
  Author: Dr. Frank Hoffmann <Dr. Frank Hoffmann at HAL01>
  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:
  -----------
  Toggle long error alerts