fix: 🐛 Fix race condition when loading derived display sets (#1718)

When we have multiple SEGs/RTSTRUCTs we intend to load the most recent
by default.

BREAKING CHANGE: 🧨 However we start to load once the first set of metadata arrives. We need
to wait until all series metadata is fetched.

✅ Closes: #1715

Co-authored-by: James Petts <jamesapetts@gmail.com>

platform/viewer/src/connectedComponents/Viewer.js

@@ -316,7 +316,7 @@ class Viewer extends Component {
 
           {/* MAIN */}
           <div className={classNames('main-content')}>
-            <ConnectedViewerMain studies={this.props.studies} />
+            <ConnectedViewerMain studies={this.props.studies} isStudyLoaded={this.props.isStudyLoaded} />
           </div>
 
           {/* RIGHT */}