Display owner name in tooltip when Vacant Indicators are selected

[moldybeats]

From issue #132:

In the tooltip, can the owner name and address (this may be different than the site address) be displayed whenever you click on a filter in the Vacant Indicators list?

Currently these Vacant Indicators display data directly from their respective data sets, and at least in the case of 311 and Dangerous Building data, they don't include the owner address. However, we deal with this situation in the Misc. > Problem Landlords filter where we run the addresses through our Address API to get additional info. If we did the same for these we could display the owner address.