Safari / Mobile Date Time Picker Issue

[cowenld]

Bug description:

While choosing a available date on the date time picker, some flickering issues with the component were highlighted. The flickering happens too fast to capture a screenshot.

Actual result:
Another calendar flickers to the right

Expected result:
Nothing should happen.

1.Desktop(safari, IE10, IE11)
2.Mobile(iPhone 6s plus, iPhone 6, windows phone(Lumia930))
3Tablet(iPad Air 2)

Link to minimally-working plunker that reproduces the issue:

https://plnkr.co/edit/uHZyEeacB1EFYKJSuIG1

Version of Angular, UIBS, and Bootstrap

Angular: 1.5.8
UIBS: 2.1.4
Bootstrap: 3.3.3

[wesleycho]

I suspect this is a duplicate and/or related to #5446