* disable smooth scrolling when opening/closing Dialogs
For iOS workaround related purposes we have to capture the scroll
position and offset the margin top with that amount and then
`scrollTo(0,0,)` to prevent all kinds of funny UI jumps.
However, if you have `scroll-behavior: smooth` enabled on your `html`,
then offseting the margin-top and later `scrollTo(0,0)` would be
handled in a smooth way, which means that the actual position would be
off.
To solve this, we disable smooth scrolling entirely in order to make the
position of the Dialog correct. This shouldn't be a problem in practice
since the page itself isn't suppose to scroll anyway.
Once the Dialog closes we reset it such that everything else keeps
working as expected in a (smooth) way.
* add `microTask` to disposables
* ensure the fix works in React's double rendering dev mode
* update changelog
Robin Malfait
6f9de8925e