We had inconsistent indentation in many places. Now we're fixing them
and adding a linter to our CI so we don't accidentally introduce
inconsistent indentations again.
We were using one label for both date selectors, but it wasn't
associated with any of them.
So we're now rendering one label per control and, just like we only show
one of these date selectors at a time, we're only showing one label at a
time.
