Option to scrap all table columns

[jwillmer]

• Imagine you are searching for a list of cars and then follow each link to a site with the car details.
• Each car site is equal and you like to scrap the specifications table
• Some cars have features in the table that are missing in the tables of other cars specs

This feature should add the missing columns to the table if it detects them.

[jwillmer]

That was hard! https://github.com/jwillmer/web-scraper-chrome-extension/commit/58d10b712b05749d3d12791eebc373ea09b6a34e