prompt to upload all data sources at same time when missing smbg and/or settings

As discussed with @skrugman and @HowardLook earlier today.

When you navigate to two-week view but don't have any smbg data:
![screenshot 2014-07-22 14 49 03](https://cloud.githubusercontent.com/assets/1588547/3665852/41426df0-11ea-11e4-8fbb-164418bf8492.png)

When you navigate to settings view but don't have any settings(/pump) data:
![screenshot 2014-07-22 14 52 10](https://cloud.githubusercontent.com/assets/1588547/3665877/75899480-11ea-11e4-90fb-75e10be9dd62.png)

@brandonarbiter would like to talk to you about upload click metrics.

@nicolashery review?