Applied bug fix from trunk r1626419. 
Applied bug fix from jira issue - OFBIZ-5773 - <@htmlTemplate.renderDateTimeField> icon buttons disappear on some pages after refresh.
Thanks Akash Jain for the contribution.


git-svn-id: https://svn.apache.org/repos/asf/ofbiz/branches/release13.07@1626420 13f79535-47bb-0310-9956-ffa450edef68