The submenu of the bottommost context menu cannot be selected

[kimvs]

Describe the bug When the summary and paging area is displayed, the submenu of the bottommost context menu cannot be selected.

To Reproduce

1. Go to 'https://nhn.github.io/tui.grid/latest/tutorial-example09-summary' or '23. Client Pagination'
2. right-click mouse on bottomost row
3. Hover over the menu at the bottom of the displayed context menu (maybe 'Export'.. )
4. It cannot select a sub-menu.

Expected behavior It should be able to select a submenu from the bottommost context menu.

Screenshots

Desktop (please complete the following information):

• OS: [windows 10 pro]
• Browser [chrome 103.0.5060.134]
• Version [Toast UI Grid 4.21.3]

Additional context Additionally, right-clicking on the summary throws an error in the console window.

[jajugoguma]

@kimvs

Thanks for report a bug. I'll fix it!