Add "old address" field to address activity reports

[inghamn]

Mike Stewart asked if it was possible to add an "Old Address" column for when a street name is readdressed. He has to add that manually as well. I said I would pass it on.
Thanks

Originally posted by @laurahaley in #113 (comment)

[inghamn]

Showing the "Old Address" for the street name changes will require a seperate custom report. I can add that as an issue so we don't forget about this idea.

It seems like you might want a special report for each different action that can be taken on addresses. I think this is because the information would be different for each action. For instance, if you are seeing "readdresses" addresses, you probably want to see what the old address. However, if you are looking at "moved to location", you probably want to know what the old and new locations are.

[laurahaley]

It might have been just the example you picked, but the move to location search you mentioned isn't really useful. It's okay if it's complicated to add an old address column to the general activity report even when the action dictates it would be null (like when an address is assigned). He's getting by with adding a column to his spreadsheet.