When selecting a month with more weeks than the current month, the time picker gains unexpected whitespace.

[atelic]

Expected behavior

I expect the time picker to fill in space when the height of the container grows.

Actual behavior

The time picker maintains empty whitespace until I scroll the area.

Steps to reproduce

1. Go to https://reactdatepicker.com
2. Open the Select Time demo to February 2019.
3. Use the next arrow to navigate to March 2019.
4. See the whitespace

[PaulRBerg]

In my case, this also happens when using the portal version.

I'm not doing any special customisation to the height of the time container.

[PaulRBerg]

I'm not sure but #1297 could have something to do with this issue.

[PaulRBerg]

Issue fixed in #1717.