NEW Converted Form::formconfirm function to a static function and removed deprecated function Form::form_confirm

NEW Converted Form::selectyesno, Form::showrefnav, Form::select_date, Form::showbarcode, Form::showfilterAndCheckAddButtons, Form::editfieldkey, Form::editfieldnav, Form::editInPlace, Form::selectMassActions to static functions

POS.

Changing 'Quadri' to Quarter..

Change of wrong key "Firsname" to "Firstname" for translation

into search fields when search field is text. Bonus: ^$ can filter all
lines with field not defined.

Else we can't use is on additionnal modules

12