[table] fix(Table2): uncontrolled resizing of cols/rows

[mattskrobola]

Fixes resizing rows/cols not visually updating for Tables that don't use the columnWidths / rowHeights prop.

I think this was introduced here where before we were comparing props.columnWidths to prevState.columnWidths where props.columnWidths was always undefined for Tables not using the prop. Now that there is an undefined check didColumnWidthsChange will always be false for Tables not using the prop.

Maybe a better spot for this update is in handleColumnWidthChanged ? We call validateGrid there, but that doesn't seem to visually update the table with the new sizes.

Checklist

• Includes tests
• Update documentation

Changes proposed in this pull request:

Added a check that prevState !== currentState for column widths and row heights when the prop is not set

Screenshot

before:

after:

[adidahiya]

thanks @mattskrobola!