add tooltip for errors on job history page

[mikeTWC1984]

Just a small nice change. I think if there are many errors on the history page tooltip would be very useful.
Basically just need add title attribute to display job description.
<span class="color_label red" title="${job.description}">

Default tooltip is slow and ugly though. I'm not sure if your current css includes any tooltip style. If not the jquery UI can be used (it's overwrites default title attribute, so it's kind of easy to attach).

code to add in the html body:

<link rel="stylesheet" href="https://code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
  <script>
	$( function() { $(document).tooltip({show: null});} );
</script>