Bug 7544 - Add ability search borrowers only on email / phone

Bug 7544 - Add ability search borrowers only on email / phone

This commit adds a new pulldown field to the patron quick search.
This pulldown "Search Fields" can have any number of field combinations
to search on. The combinations added in this commit are:

Standard: Default, searches on original fields
Email: Searches on email, emailpro, and B_email
Borrower Number: Searches on borrowernumber
Phone Number: Searches on phone, phonepro, B_phone, altcontactphone, and mobile

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Tested by running searches on all the new fields, and the old fields
with limits on branch and category. The seach on phone number could be
a bit more inclusive, but it works with and without symbols so I
give my sign off on this patch.

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Documentation should note that phone numbers should be searched only on the
numbers of a phone number, and separate the area code and exchange with spaces,
regardless of how the number is entered in the database.

So no dashes or parentheses in the phone search, and the last 7 search works with spaces, i.e. xxx xxxx.

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>