On creation of new table, with no existing rows, actionsColumnHTML to be prefixed with 'this.' to fix error. (Line 217)

[tomhobsonxd]

newColumnHTML = newColumnHTML + actionsColumnHTML; // add action buttons
to become
newColumnHTML = newColumnHTML + this.actionsColumnHTML; // add action buttons

[CraftingGamerTom]

Thanks for opening and issue @tomhobsonxd , Im not able to allocate time to this project at the moment. If you have time, please open a pull request for me to review?

Thanks for contributing!