Broken in IE11

[jotatoledo]

Currently the calculatedHeight in web-accordion-item is not being correctly calculated, which ends displaying an incomplete content in IE11.

Steps to reproduce:

1. See the demo https://stefanhuber.github.io/web-accordion/
2. Reduce the width of the window
3. Try expanding a panel, content will be truncated.

[stefanhuber]

Ok. This seems to be true for all web-browsers? If you change the width of the web-accordion-item by changeing the the width of the web-browser the heigth doesn't change.

The question is if this is an important use-case?

[jotatoledo]

For me the issue is more related to the fact that after a certain treshold of content amount, only a portion of it is displayed on collapse. The resize step was just to simulate a larger amount of content in a smaller space.

Ill try to setup a small repro