LP#1207533: item-oriented Triggered Event Log

LP#1207533: item-oriented Triggered Event Log

Building on the previous commit from Jason Etheridge, this adds an
Angular reimplementation of the item-oriented TEL variant.  In addition,
it separates the grid settings persist key and creates the YAOUSen
needed to save those grid settings.

Because these interfaces make use of the flattener service to drive grid
construction and data retrieval, staff will have to have the appropriate
VIEW_USER permission to be able to see patron related data in the
item-oriented grid.

Funding for these interfaces comes from PaILS, for the patron-oriented
interface, and from ECDI, for the item-oriented one.

Signed-off-by: Mike Rylander <mrylander@gmail.com>