## In the Fields_Tab_Handler, we respond to a button click to open field details by doing:
fields_id = obj.parents('tr').data('fields_id')
dlg = @createSubHandler('Field_Details_Dialog','Field_Details_'+fields_id)
        if dlg
            dlg.loadLayoutPostOptions = id: fields_id
        dlg.init


## AND here is the field Details class:
class Field_Details_Dialog extends Dialog_Handler
    init: () ->
        @layoutUrl  = 'layers/fielddetails/load_layout'
        @saveUrl    = 'layers/fielddetails/update'
        @createDialog()


    afterLoadLayout: () ->
        @openDialog()

        ### SAVE ###
        @dialog.find('.save-btn').click () =>
            @save()