sendBoxBackground not applying to input/textarea input background color

[tdurnford]

Screenshots

Version

Local build from master

Describe the bug

The sendBoxBackground color is not being applied to the input/textarea field. Also, there is no way to modify the input's placeholder text color in defaultStyleOptions.

To Reproduce

Steps to reproduce the behavior:

Change the sendBoxBackground in styleOptions.

window.WebChat.renderWebChat({
  directLine: window.WebChat.createDirectLine({ token }),
  styleOptions: { sendBoxBackground: '#0063B1', sendBoxTextColor: 'White', sendBoxButtonColor: 'White', sendBoxPlaceholderColor: 'White', sendBoxTextWrap: false }
}, document.getElementById('webchat'));

[Bug]