15.1 Latest Patch- Template Issues

We have recenlty upgraded a client from 15.0 to 15.1 and are having some issue with some of the code.  To begin with their is some code that allows sections to be collapsible which honestly should not be.  One example of this is:

<div id="ctl00_TemplateBody_EventsGridViewAll_DataSourcePanel_Head" class="PanelHead Collapsible" title="Click to collapse/expand Source.">

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PanelHead div contents on Logon panel

Has anyone managed to find where they can change the contents (text) of the PanelHead div at the top of the iMIS logon panel?

Thanks
Costanza