DateChooser with height of 200 or so hides last row of dates

If you set the height on a DataChooser to be under 230 pixels the last row of the DateChooser may be hidden.

Code to reproduce:
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Screen shot on Chrome

Start by running the supplied MXML example with two DateChooser components at heights 200 and 230, then inspect the DateChooser layout entry point and compare the rendered calendar rows. Done means the final row remains visible at the smaller height without breaking the taller example.

Written by the indexing model from the issue text.