[IDC-1670] Better display of derived datasets in side panel. (#1962)

* WIP

* WIP

* WIP

* WIP

* Working click on seg.

* Load SEG if not loaded and set active.

* RTSTRUCT

* feat: 🎸 Display SEG and RTSTRUCT in side panel

* Throw error if dataset not available.

* Add delay in microscopy viewer e2e test.

* Add delay in microscopy viewer e2e test.

platform/viewer/src/connectedComponents/ViewerMain.js

@@ -133,12 +133,23 @@ class ViewerMain extends Component {
     StudyInstanceUID,
     displaySetInstanceUID,
   }) => {
-    const displaySet = this.findDisplaySet(
+    let displaySet = this.findDisplaySet(
       this.props.studies,
       StudyInstanceUID,
       displaySetInstanceUID
     );
 
+    if (displaySet.isDerived) {
+      const { Modality } = displaySet;
+      displaySet = displaySet.getSourceDisplaySet(this.props.studies);
+
+      if (!displaySet) {
+        throw new Error(
+          `Referenced series for ${Modality} dataset not present.`
+        );
+      }
+    }
+
     this.props.setViewportSpecificData(viewportIndex, displaySet);
   };