This is fantastic! Thank you. I primarily have users who are not familiar with markdown, so this will allow them to format text and learn the ways.
I did notice that, as mentioned before, my native flarum editor disappears when I click the preview, side-by-side, or fullscreen buttons. I personally don't find a necessity for any of these as the Flarum editor allows for this already. Thus, for the time being I have simply hid them with the following CSS:
.editor-toolbar .fa-eye,
.editor-toolbar .fa-columns,
.editor-toolbar .fa-arrows-alt,
.editor-toolbar .fa-arrows-alt + i {
display: none;
}
Thanks again for this extension!