Highlight newly added events for 1.5s.

Had to bring in jquery.ui.effects-highlight js module.  Also had
to remove datetime formatting for now, as it was causing failures
in test mode with sqlite, due to to_formatted_s failing.
log_dates coming back from the ORM will now be converted to Time.

This was necessary because we are using Sqlite in test, and the
sqlite adapter does not return an instance of Time, but a string.