fix: Freezing a tree table column crashes the panel (#1192)

Fixes #1136 

Column is only freezable when the table is not a tree table.

Reset `frozenColumns` on rollup change.

Author: emilyhuxng

packages/iris-grid/src/IrisGrid.tsx

@@ -3198,6 +3198,7 @@ export class IrisGrid extends Component<IrisGridProps, IrisGridState> {
     this.setState({
       rollupConfig,
       movedColumns: [],
+      frozenColumns: [],
       sorts: [],
       reverseType: TableUtils.REVERSE_TYPE.NONE,
       selectDistinctColumns: [],

packages/iris-grid/src/IrisGridTreeTableModel.ts

@@ -3,7 +3,7 @@ import memoize from 'memoize-one';
 import { GridRange, ModelIndex } from '@deephaven/grid';
 import { Column, TreeRow, TreeTable } from '@deephaven/jsapi-shim';
 import { assertNotNull } from '@deephaven/utils';
-import { UIRow } from './CommonTypes';
+import { UIRow, ColumnName } from './CommonTypes';
 import IrisGridTableModelTemplate from './IrisGridTableModelTemplate';
 
 export interface UITreeRow extends UIRow {
@@ -182,6 +182,12 @@ class IrisGridTreeTableModel extends IrisGridTableModelTemplate<
         )
       )
   );
+
+  updateFrozenColumns(columns: ColumnName[]): void {
+    if (columns.length > 0) {
+      throw new Error('Cannot freeze columns on a tree table');
+    }
+  }
 }
 
 export default IrisGridTreeTableModel;

packages/iris-grid/src/mousehandlers/IrisGridContextMenuHandler.tsx

@@ -236,7 +236,8 @@ class IrisGridContextMenuHandler extends GridMouseHandler {
       columnWidth => columnWidth === 0
     );
     const isColumnFreezable =
-      model.getColumnHeaderParentGroup(modelIndex, 0) === undefined;
+      model.getColumnHeaderParentGroup(modelIndex, 0) === undefined &&
+      !(isExpandableGridModel(model) && model.hasExpandableRows);
     const isColumnFrozen = model.isColumnFrozen(modelIndex);
     actions.push({
       title: 'Hide Column',