change dataset trigger has potential bug if map has been zoomed out while county/state still selected

[DanielJWood]

There is a bug for the following section of the main.js, change dataset trigger. The zoom variables aren't always an indication of what is being looked at. i.e. if you click the button to zoom back out of the county/state view, your zoom variable will be set to zoomNational instead of zoomCounty.

        if (zoomNational == true) {          
          var us_data = BigData.state_data[0]["values"][0]
          for (var key in us_data) {
              if (us_data.hasOwnProperty(key)) { 
                  if (+us_data[key] == NaN || +us_data[key] == 0){
                    us_data[key = us_data[key]]
                  }else {
                    us_data[key] = +us_data[key]
                  }
              }
          }                    
          updateTable(us_data,type)
        } else if (zoomCounty == true) {
          console.log('here')
          updateTable(d3.select("g.counties").selectAll("path.selected").datum(),type)
        } else if (zoomState == true) {
          updateTable(d3.select("path#" + selectedState.properties.abbr).datum(),type)
        }

Solution to this would be to look for what is selected. Following psuedo code:

if a county is selected
-> updateTable(countyID,type)
else if state is selected 
-> updateTable(stateID,type)
else
-> updateTable(national,type)

Alternatively, an easier solution would be to remove the "zoom out" button at bottom right.