The 4 period buttons used actiontype:urldata which calls
_buildDataHandler requiring desc.status_of[data.status] mapping.
Neither was provided, causing 'Cannot read properties of
undefined (reading undefined)' crash.
Fix: use actiontype:method with method:render_urldata (ChartBar's
inherited EchartsExt method). ChartBar's data_url now uses
data_params={'period':'all'} for default, buttons pass {period:x}
via render_urldata params.
