Refactory on xsd files

[mrisal...@libero.it]

Hi to all,

I saw that into widget-screen.xsd the element name "field-map" still having the 
attribute "env-name" instead of "from-field" like the other xsd files.
Is it something wanted or simply forgot to change it ?

This could be an exampe of using the new attribute "from-field" in the screen 
widgets.

<screen name="EditPayment">
        <section>
            <actions>
                <set field="titleProperty" value="PageTitleEditPayment"/>
                <set field="tabButtonItem" value="editPayment"/>
                <set field="paymentId" from-field="parameters.paymentId"/>
                <entity-one entity-name="Payment" value-field="payment">
                    <field-map field-name="paymentId" 
from-field="parameters.paymentId"/>
                </entity-one>

Thanks
Marco