Pivot Table Edits: Removing columns from pivot table might delete other columns

[aarondr77]

1. Create a pivot table with two values
2. Insert a new column to the end of the pivot table
3. Open the pivot table configuration and delete the one of the values
4. Notice that your new column is also gone because it was not able to insert the column at position 4 because the dataframe didn't have 3 columns already.

To fix, if an add column event fails, just add the column using df['New Column Name'] = 0 to add it to the end of the table by default. We would want to handle this inside of the add column step performer.