Fixed a bug in 'required' binding linked that prevented to use tab navigation; added focus control to all 'input' fields so they can be used with tab navigation (experimental); suppressed call to obsolete xtiger.debug.loadDocument function; better 'choice' plugin with support for multiple options and XML serialization to single elements with xvalue; added 'select2' filter to use select2 combobox on top of the 'choice' plugin (select2 itself will be included into 3rd-part soon), the new 'choice' plugin architecture should allow to easily plug-in different combobox libraries on top.