TPAC: Change title tooltip in results table to useful message

TPAC: Change title tooltip in results table to useful message

From dbs's original commit:

The tooltip that would display when hovering over the title of a result
in the results table was simply the URI-escaped version of the title
text - not particularly helpful. Change this to say "Display record
details" as an actual hint about what action will occur when the user
clicks on a title in the results list.

This modified commit changes the title to 'Display record details for
"<title>"'

This commit also introduces the HTML plugin as a new
loaded-by-default template plugin.  Among other things, it's useful for
ensuring HTML attributes are safely encoded, moresoe than |html, which
does not escape quotes.

https://bugs.launchpad.net/evergreen/+bug/902979

Signed-off-by: Bill Erickson <berick@esilibrary.com>