Bug 13869: Wrong capitalization of 'Save Report' in guided reports

Bug 13869: Wrong capitalization of 'Save Report' in guided reports

On the last step of saving a new guided report to the database,
the button is labelled 'Save Report', but should be 'Save report'.

To test:
- Create a new guided report from the reports page
- Check on the very last step, when saving the report to the
  database, the button is labelled 'Save Report'
- With the patch applied, this reads 'Save report' instead

http://bugs.koha-community.org/show_bug.cgi?id=13868

Works as expected.
Signed-off-by: Marc Veron <veron@veron.ch>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Safe change. Script uses the "phase" variable which remains "Save Report"

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>