Add filter input to <ColumnsButton> when there are many columns

[slax57]

Problem

When a <DataTable> has many columns, the ColumnsButton dropdown is hard to use.

Solution

When there are more than 5 columns, show an input in the top of the dropdown to filter the column list.

How To Test

• http://localhost:9010/?path=/story/ra-ui-materialui-list-columnsbutton--few-columns
• http://localhost:9010/?path=/story/ra-ui-materialui-list-columnsbutton--label-types
• Can also be tested in the simple demo (make run)

Additional Checks

• The PR targets master for a bugfix or a documentation fix, or next for a feature
• The PR includes unit tests (if not possible, describe why)
• The PR includes one or several stories (if not possible, describe why)
• The documentation is up to date

Also, please make sure to read the contributing guidelines.

[djhi]

Looks good. However, there's no way to interract with neither the filter input nor the columns switches with the keyboard: mutiple tabs just close the popover, and arrow keys don't help either.