[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.

extensions/dicom-rt/src/getSourceDisplaySet.js

@@ -0,0 +1,38 @@
+export default function getSourceDisplaySet(studies, rtStructDisplaySet) {
+  const referencedDisplaySet = _getReferencedDisplaySet(
+    rtStructDisplaySet,
+    studies
+  );
+
+  rtStructDisplaySet.load(referencedDisplaySet, studies);
+
+  return referencedDisplaySet;
+}
+
+const _getReferencedDisplaySet = (rtStructDisplaySet, studies) => {
+  let allDisplaySets = [];
+
+  studies.forEach(study => {
+    allDisplaySets = allDisplaySets.concat(study.displaySets);
+  });
+
+  const otherDisplaySets = allDisplaySets.filter(
+    ds => ds.displaySetInstanceUID !== rtStructDisplaySet.displaySetInstanceUID
+  );
+
+  const ReferencedSeriesSequence = Array.isArray(
+    rtStructDisplaySet.metadata.ReferencedSeriesSequence
+  )
+    ? rtStructDisplaySet.metadata.ReferencedSeriesSequence
+    : [rtStructDisplaySet.metadata.ReferencedSeriesSequence];
+
+  const referencedSeriesInstanceUIDs = ReferencedSeriesSequence.map(
+    ReferencedSeries => ReferencedSeries.SeriesInstanceUID
+  );
+
+  const referencedDisplaySet = otherDisplaySets.find(ds =>
+    referencedSeriesInstanceUIDs.includes(ds.SeriesInstanceUID)
+  );
+
+  return referencedDisplaySet;
+};