Bug 15498: Let the user choose the CSV profile to export circ history

Bug 15498: Let the user choose the CSV profile to export circ history

The way the export options are displayed at the bottom of the checkouts table
was not consistent.
Prior to this patch set, they are display if ExportRemoveFields or
ExportWithCsvProfile is set.
It does not make any sense, the user could want to export the checkouts in
iso2709 format without having to define a csv profile and fill the pref.

Moreover the behavior of this pref did not match its description: it's used as
a default CSV profile when exporting records from the export tools or the
command line.

This patch set adds a new pref ExportCircHistory and remove
ExportWithCsvProfile. The new pref is set if ExportWithCsvProfile or
ExportRemoveFields were set.
A new dropdown list with the CSV profile list will be displayed in the
export area, at the bottom of the checkouts table.

Note that now --csv_profile_id is mandatory for the export command line
(misc/export_records.pl) if the export format is csv.

Test plan:
0/ Do not execute the DB entry
1/ Clear both ExportWithCsvProfile and ExportRemoveFields prefs
2/ Execute the DB entry
3/ ExportCircHistory should not be set and the export options should not
be displayed at the bottom of the checkouts table.
4/ Remove the pref
  DELETE FROM systempreferences WHERE variable='ExportCircHistory';
and reinsert the previous one, with a value:
  INSERT INTO systempreferences (variable, value) VALUES
  ('ExportWithCsvProfile', 'something');
Execute the DB entry again
=> The now pref should be now set
5/ Export some checkouts using the CSV entry
6/ Note that the export tool and commandline script still work using the
csv format. You have to provide a --csv_profile_id option to make it
work.

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>