Column Management Modal retains unapplied checkbox changes on Cancel

Go to the documentation page: https://www.patternfly.org/extensions/component-groups/column-management-modal

Click the Manage Columns button.

Uncheck all columns

Click the Cancel button (or the 'X' close icon).

Click the Manage Columns button again.

Actual Results: All the columns you unchecked in Step 3 are still unchecked, even though the changes were canceled and never applied

Expected Results: The modal should reset its state on close/cancel. Reopening the modal should show the original

Jira Issue: PF-4266

以 Column Management Modal 文档页面作为入口，并重现使用 Manage Columns、Cancel 和关闭图标的操作序列。将重新打开的模态框状态与原始状态进行比较；当已取消的复选框更改被丢弃，并且重新打开时显示原始选择时，即表示完成。