RichEditor props passing

[Ducica]

Is your feature request related to a problem? Please describe.

The rich editor component, is not accepting "rest" props. (

react-invenio-forms/src/lib/forms/RichEditor.js

Line 21 in f6ac055

export class RichEditor extends Component {

)
Meaning it is possible only to send specific props to the Editor from tinymce itself

const { id, initialValue, disabled, minHeight, onBlur, onChange, onFocus, editorConfig, inputValue, onEditorChange, } = this.props;

Ideally it should be like this
const { id, initialValue, disabled, minHeight, onBlur, onChange, onFocus, editorConfig, inputValue, onEditorChange, ...rest } = this.props;

`initialValue={initialValue}
value={inputValue}
init={config}
id={id}
disabled={disabled}
onBlur={onBlur}
onFocus={onFocus}
onChange={onChange}
onEditorChange={onEditorChange}
{...rest}

`
This can be helpful in various situations. Currently, we are working on our timeline feed, and I would like to register onKeyDown event, which would basically automatically trigger submit/edit of the comment, but it is not possible to do in current implementation unfortunately. I think this would be probably beneficial for RDM as well (that after typing you can just hit enter and send/edit the comment). Please let me know what you think. If there is no capacity on your end, I could make a PR.