Bug 29837: Remove JS error during installer

Bug 29837: Remove JS error during installer

Uncaught ReferenceError: _ is not defined

the _() function is called from calendar.inc, but calendar.inc is
 included before the definition of this function in
installer-intranet-bottom.inc

Test plan:
Confirm that the JS error is gone

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>