Remove usage of the data-original-title attribute
The HTML in Atlas uses the data-original-title attribute which serves no purpose other than to clutter up the code. FWICT this is left over code from when Atlas used the Bootstrap Popover plugin which was removed in commit 7a0ee0c7e69b10c33d671395f17c9cf8664bd2f9.
The Bootstrap Tooltip plugin overwrites the data-original-title attribute when the title attribute is specified in the fixTitle function. In the current code base all elements that use the data-original-title attribute also specify the title attribute so the former serves no purpose.
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