Flatpickr: Calendar doesn't display correctly when inline and container initial display state is 'none'

[GlennMatthys]

Reproduction link (version 4.4.4): https://jsfiddle.net/xeh3g4zx/6/
Reproduction link (version 4.3.2): https://jsfiddle.net/rzyksrhk/2/

• flatpickr version used: latest at time of writing (4.4.4)
• Browser name and version: Chrome 65.0.3325.181 (Official Build) (64-bit)
• OS and version: Windows 10 1709

When the initial CSS display state of the container is 'none' and is then switched to 'block', the calendar is rendered incorrectly:

This is different from the previous minor version, 4.3.2, which displays the calendar correctly even if the container's initial display state is 'none':

[karolyi]

+1. from 4.4.2 on, the inline calendar displays like this:

[afabros]

I have the same issue with 4.4.4. Temporary solution is to remove inline: true.

[chmln]

Fixed @ v4.4.5