widgets should check for repeated 'newResults' events

[schloett]

The 'newResults' event might be thrown several times with the same data attached. Therefore, each widget should check, if it already processed the data. This should be possible via the queryID. Exemplary sketch:

var lastProcessedQueryID;
window.onmessage = function(msg) {
  if(msg.data.event && msg.data.event === 'eexcess.newResults') {
    if(lastProcessedQueryID && lastProcessedQueryID === msg.data.data.queryID) {
      // data already processed, do nothing
    } else {
      // process data
      // ....
      // store queryID of last processed data
      lastProcessedQueryID = msg.data.data.queryID;
  }
}