theme_bootstrap/less/moodle/editor.less

// Over ride bootstrap editor CSS.

body {
    margin: 8px;
}
.container .moodleSkin img.mceIcon {
    display: block;
    height: auto;
    width: auto;
}
.container .moodleSkin img.mceIcon {
    display: block;
    height: auto;
    width: auto;
}