Made copyFromPreviousTask a widget type so that it can be added to any template, not just those that already have it hard coded.

Changed the selector for the copy from previous task button (event handler binding) to a class rather than an id.

Also the renderBootsrapField tags can now optional take a field instance, rather then having to do a lookup based on fieldtype (which effectively limits the number of 'widgetPlaceholder' fields to one) so that more than one 'widgetPlaceholder' can be present on the form