Change size of name field at admin

Yes, you should change code in administrator/components/com_calcbuilder/views/utility/tmpl/edit.php :
- line 228 change
var name = new Element('input').setProperties({type:'text',size:'10',id:'name'+counter,'name':'name'+counter});
to
var name = new Element('input').setProperties({type:'text',size:'20',id:'name'+counter,'name':'name'+counter});

- line 408 change
< input size="10" name="name< ? php echo $counter; ?>" id="name" type="text" value="< ? php echo $field->name; ?>">
to
< input size="20" name="name< ? php echo $counter; ?>" id="name" type="text" value="< ? php echo $field->name; ?>">