Actually it is much easier to show a ModalView on top - we are using a simple CSS pseudo-element trick to vertical-align the ModalView without depending on its size. The trick is to make the ModalView animation container with display: inline-block and vertical align: middle and add a pseudo-element in front of it also with the same styles, but with height: 100% instead. This effectively makes the ModalView centered vertically. So the only thing you need to make it aligned to top is to add this CSS rule:
The difficult thing now is to selectively apply this to only some of the ModalViews you have. This can be done by using the ModalView init event to set a class on its outermost container, .km-modalview-root, and use it to align the ModalView to top. Check the demo here
and let me know if this helps.
About the place where this is documented - you're correct, this information should also be added to the breaking changes document here
, I'll see to it. I've also updated your points for this.
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