Bug Report

• Package version(s): latest
• Browser and OS versions: All OS

Priorities and help requested (not applicable if asking question):

Requested priority: (Blocking, High, Normal, Low) : High

Products/sites affected: (if applicable) VSTS

Describe the issue:

When the label of choice group item is big the choice group clips the label for that item.

Actual behavior:

Width and height of choice group item should not be fixed. If we use imageSrc it work fine as there is no pre set height and width.

Here is the code which causes issue:
https://github.com/OfficeDev/office-ui-fabric-react/search?utf8=%E2%9C%93&q=choiceFieldIsIcon&type=

https://github.com/OfficeDev/office-ui-fabric-react/search?utf8=%E2%9C%93&q=ms-choiceField-iconField-size&type=

Expected behavior:

Width of item should increase and not be constrained to 96 px

If applicable, please provide a codepen repro: