Add Calculated Metrics to CJA Full Table Export

Add Calculated Metrics (like Distinct Count) to CJA's Full Table Export capabilities. This is important as right now you cannot include them in Full Table Export, which limits what data we can export. For example, if we have a calculated metric taking the sum of 20 different activities, we currently cannot export that information in one table. Instead, we would need to create and export four different tables with all of those activities, and the VLOOKUP them together in Excel. Also, not being able to include Distinct Count metrics is also a major limitation, as that is a very common metric (e.g. 'distinct count of emails received). In an ideal situation, Calculated Metrics would be included in CJA's Full Table Export's OOTB capabilities.