Bug 9479: FIX conflict with Bug 9014

Bug 9479: FIX conflict with Bug 9014

3rd parameters of output_pref is already used

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
All tests and QA script pass.

Checked sorting and display on notices page with various
settings for dateformat and TimeFormat system preferences.

Also checked other pages for correct display:
- List of checkouts in patron account
- Order search result list
- Basket list in vendor search
- Staff detail page

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>