Bug 8637: Lack of control on mandatory in orderreveive.tt

Bug 8637: Lack of control on mandatory in orderreveive.tt

Just add a check in Jscript when the form is submited, the same as in additem.tt
On Owen's suggestion I have added the red color and 'Required', the same as in additem.
On Jonathan's suggestion I have used the CSS class for red and italic and I have changed a variable's name (alertString2).
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Mandatory fields are now correctly checked on saving.

On other Jonathan's suggestion I have created a new class "missing" and I have added the background to staff-global.css.
The same for additem.tt.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Retested because of minor CSS change. Works nicely.

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>