CRM-15723 Joomla 3 Footer Bar Overlay

Fix issue with the Joomla 3 admin footer overlaying the action buttons
File adjustments per Coleman

Make changes to the file based on feedback from Coleman
More changes

Changes I missed the first time because of cut and paste.
Merge pull request #4718 from crusonweb/CRM-15723

CRM-15723 Joomla 3 Admin Footer Overlays Action Buttons