Tmss code cleanup part 4

This Cleans up the code a bit and adjusts some unit tests

SAS/TMSS/frontend/tmss_webapp/src/components/JSONEditor/JEditor.js

@@ -1330,12 +1330,12 @@ function getFrequencyFromSubbandOutput(subbandArray,bandpassFilter) {
                     }
                     selectedStationsContent += '</div>';
                     // Remove existing child selected station label and div
-                    var stationListParentDiv = document.getElementsByName(path)[0].parentElement;
+                    let stationListParentDiv = document.getElementsByName(path)[0].parentElement;
                     while (stationListParentDiv.childElementCount > 2) {
                         stationListParentDiv.removeChild(stationListParentDiv.lastChild);
                     }
                     // Append new children to display selected stations
-                    var selectedStationsDiv = document.createElement('div');
+                    let selectedStationsDiv = document.createElement('div');
                     stationListParentDiv.appendChild(selectedStationsDiv);
                     selectedStationsDiv.outerHTML = selectedStationsContent;
                 }