Viewport grid load default as 1x1 and load first image of series by default (#1817)

extensions/measurement-tracking/src/panels/PanelStudyBrowserTracking/PanelStudyBrowserTracking.jsx

@@ -201,10 +201,10 @@ function PanelStudyBrowserTracking({
     );
     const updatedExpandedStudyInstanceUIDs = shouldCollapseStudy
       ? [
-          ...expandedStudyInstanceUIDs.filter(
-            stdyUid => stdyUid !== StudyInstanceUID
-          ),
-        ]
+        ...expandedStudyInstanceUIDs.filter(
+          stdyUid => stdyUid !== StudyInstanceUID
+        ),
+      ]
       : [...expandedStudyInstanceUIDs, StudyInstanceUID];
 
     setExpandedStudyInstanceUIDs(updatedExpandedStudyInstanceUIDs);
@@ -285,7 +285,6 @@ function _mapDisplaySets(
 ) {
   const thumbnailDisplaySets = [];
   const thumbnailNoImageDisplaySets = [];
-
   displaySets.forEach(ds => {
     const imageSrc = thumbnailImageSrcMap[ds.displaySetInstanceUID];
     const componentType = _getComponentType(ds.Modality);