Bug 11562: re-sort sysprefs.sql

The QA tools does not manage to catch error sorting on the sysprefs.sql
file if it is already badly sorted.

This patch tidies up the sysprefs file.

TEST PLAN
---------
[1] Verify that loading sysprefs.sql into an empty Koha
    database (or one whose system preferences table is
    is empty) works.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>

RM note: I must point out that there ZERO functionality associated
with the order that system preferences occur in that SQL script; they are
sorted solely in an attempt to reduce the likelihood of merge conflicts
during the development process.  Consequently, I dislike language that
suggests it is an "error" if sysprefs.sql happens to not be perfectly
sorted; it is at most an inconvenience.