Field property "size" accepts non-numeric input

Description of problem:
For some field types there is a "size" property in the field properties window.
The size property determines width of input element in the browser (in characters).

However in form modeler the "size" property also accepts non-numeric input - but it should only accept numbers.

The problem is that in forms which represent field properties of each filed type, the "size" field has type="InputText" (unlike for example "maxlenght" field, which correctly uses field of type="InputTextLong", which does not accept non-numbers).

Plase use type="InputTextLong" also for "size" field in the forms for each field type.

Version-Release number of selected component (if applicable):
BPMS 6.1.0 DR1

How reproducible:
Always

Additional info:

Go to:
droolsjbpm/jbpm-form-modeler/jbpm-form-modeler-core/jbpm-form-modeler-service/jbpm-form-modeler-service-core/src/main/resources/org/jbpm/formModeler/core/forms

and run this to see all the Field property forms which are affected:
cat *.form | grep "<field " | grep name="size"