bugfix: fsaverage hides ui until repaint

src/atlasComponents/sapiViews/core/parcellation/smartChip/parcellation.smartChip.style.css

@@ -2,6 +2,7 @@
 {
   position: relative;
   overflow: hidden;
+  margin: 0.5rem;
 }
 
 .otherversion-wrapper.loading > sxplr-sapiviews-core-parcellation-chip

src/viewerModule/viewerCmp/viewerCmp.component.ts

@@ -321,6 +321,7 @@ export class ViewerCmp implements OnDestroy {
     switch(event.type) {
     case EnumViewerEvt.VIEWERLOADED:
       this.viewerLoaded = event.data
+      this.cdr.detectChanges()
       break
     case EnumViewerEvt.VIEWER_CTX:
       this.ctxMenuSvc.context$.next(event.data)