message: update assembly-symmetry UI when repr is added
diff: @@ -35,6 +35,9 @@ export class AssemblySymmetryControls extends CollapsableControls<{}, AssemblySy
  description: StructureHierarchyManager.getSelectedStructuresDescription(this.plugin)
  })
  });
  + this.subscribe(this.plugin.events.state.cell.stateUpdated, e => {
  + if (e.cell.transform.transformer === AssemblySymmetry3D) this.forceUpdate();
  + });
  this.subscribe(this.plugin.behaviors.state.isBusy, v => this.setState({ isBusy: v }));
  }
  