Make click-through metric available in Data Warehouse

[#1]

A simple change that would help to enhance our campaign reporting when using data warehouse.

[#2]

Since click-throughs are identical to tracking code instances, I'm flagging this as a duplicate of Make instances available in Data Warehouse - show your support and upvote the idea there!

[#3]

For info, for anyone else looking for it : If you add the Dimension 'Tracking Code' and the Metric 'Campaign View' and 'Campaign View (Participation)' in Data Warehouse, you'll see the latter metric outputs as "Campaign Click-Throughs (Participation)" and seems to match the 'Campaign Click-throughs' metric in Workspace.