Form mass validation and filtering

[gsouf]

We shouold be able to add a global filter to the form or for a list of element

for instance we could want all text inputs to be sanitized with the filter Trim

[gsouf]

$group->globalValidator($validator, "*"); // add a validator to all children

$group->globalFilter($filter, "primary"); // add a validator to all primary elements (inputs, textarea, select...)

$group->globalFilter($filter, "input:text, input:password"); // add a validator to all password and text inputs