Fix query issue

Query issue was not really an issue at all. The query executes asynchronously, so I was hitting the following code (which attempted to use a nil Dictionary) before the query finished.

Solution:
Prepare the UI label initially with a question mark. Once the query is done, in the callback, call a new method to update that UI element.
The reference to that element is now global and should be fixed with the rest of the global elements probably

NOTE: This still uses the first result from the query as the most recent. This is not always the case!!!
Add query helper to determine most recent entry

Added findMostRecent to determine what the most recent entry was for showing the user’s last entered value was.
According to email from Josh Ault, database results are deterministic and are very close to sorted by createdDate (but not guaranteed-determined by database). As a result, we can be virtually assured that the result will come in the 100 page size specified (or even in 50, probably—possible future change).

TODO: doctor stuff
Minor commit