Incorrect behavior if init keenSlider on display:none element and toggled visibility through button click

[bikram-negi-91]

when the keen slider is initialised at the start with display none style and later on an event it is displayed and styles are changed,it breaks the functionality and the UI, as styles are not being added.But as soon there change in viewport,it starts working

Previously same issue was registered : #99

Please find sample sandbox code : https://codesandbox.io/s/eloquent-germain-jpvkcj

We are still facing such issue.We are using 6.8.6 version.