image_widget_crop.css breaks the style of other widgets

Problem/Motivation

image_widget_crop.css contains some very broad rules and it breaks the style of other widgets.

Steps to reproduce

1. Use Claro.
2. Add an ImageWidget crop widget to a form mode.
3. Also add a File widget to the same form mode.
4. Display the form with a screen matching max-width: 480px.
5. Upload a file in the ImageWidget crop widget.
6. Upload a file in the File widget.
7. The filename in the File widget is displayed incorrectly.

Proposed resolution

The CSS rules should be prefixed to only apply to image_widget_crop widgets.