Offset.top is hardcoded in DateTimeField

[sharkinsspatial]

After calculating the dynamic offset.top correctly it is hardcoded to 40 here when no direction prop is provided. I might be misunderstanding the logic here but it seems the DateTimeField will always be positioned at this offset.

[crobinson42]

+1 for a PR enhancement

[crobinson42]

In the meantime, you can use a shim to overwrite... it's hacky but if you need it..well, you need it!

[crobinson42]

see #155