Re #2259: UI refinements for warnings (#2397)

* Re #2259: highlight series thumbnails border for active series (series in the active viewport)
* Re #2259: add the warning icon also on the active viewport as an overlay

platform/core/src/utils/loadAndCacheDerivedDisplaySets.js

@@ -107,7 +107,12 @@ async function loadAndCacheDerivedDisplaySets(referencedDisplaySet, studies, log
     });
 
     try {
-      await recentDisplaySet.load(referencedDisplaySet, studies);
+      if (recentDisplaySet.hasOwnProperty('getSourceDisplaySet') &&
+        typeof recentDisplaySet.getSourceDisplaySet === 'function') {
+        await recentDisplaySet.getSourceDisplaySet(studies);
+      } else {
+        await recentDisplaySet.load(referencedDisplaySet, studies);
+      }
     } catch (error) {
       recentDisplaySet.isLoaded = false;
       recentDisplaySet.loadError = true;