LP#1772955: Only include xacts with balance in summary

LP#1772955: Only include xacts with balance in summary

This commit adds a new view and IDL definition that shows the total
owed/paid/balance for transactions that have a balance other than 0.
This new view is used in the patron summary bar, and access is provided
wherever the all-open-transactions version is available in case we want
to move to the new one elsewhere.

Signed-off-by: Mike Rylander <mrylander@gmail.com>
Signed-off-by: Ruth Frasur <rfrasur@library.in.gov>
Signed-off-by: Jason Boyer <JBoyer@EquinoxInitiative.org>