Additional Properties icons are not working when using Bootstrap 4

[pedroth]

Description

Additional Properties icons are not working when using Bootstrap 4.

This happens because Bootstrap 4, removed glyphicons.

Steps to Reproduce

1. Use Bootstrap 4, instead of 3
2. Create a form with Additional Properties

Expected behavior

Icons should appear when creating a form with Additional Properties

Actual behavior

Icons don't appear when creating a form with Additional Properties

Version

"react-jsonschema-form": "^1.6.1"

[epicfaace]

The solution to this eventually is to create a Bootstrap 4 theme using the withTheme component.

Might there be a short-term solution to this that would make the default icons work even in bootstrap 4?

[C-odes]

My project uses bootstrap 4, this library requires bootstrap 3. Is there any way to make it work with only 4?

[cefn]

I was able to add glyphicons by including this in my source. That doesn't mean it is 'working' as I have only tested it in a limited way.

<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap-glyphicons.css" rel="stylesheet">

[epicfaace]

There are other issues with using bootstrap 4 with the current default react-jsonschema-form theme, such as the array buttons not showing up either. I'm merging this issue with #1455.