feat(form): support shouldtrim per fieldrule

This PR adds support to use the form wide shouldTrim setting individually per field rule

Author: lubber-de

src/definitions/behaviors/form.js

@@ -1315,7 +1315,7 @@ $.fn.form = function(parameters) {
                 // cast to string avoiding encoding special values
                 value = (value === undefined || value === '' || value === null)
                     ? ''
-                    : (settings.shouldTrim) ? String(value + '').trim() : String(value + '')
+                    : (settings.shouldTrim && rule.shouldTrim !== false) || rule.shouldTrim ? String(value + '').trim() : String(value + '')
                 ;
                 return ruleFunction.call(field, value, ancillary, $module);
               }