src/main/js/editor.dev.css

.ProseMirror-menubar {

    border-top-left-radius: inherit;
    border-top-right-radius: inherit;
    color: #666;
    padding: 1px 6px;
    border-bottom: 1px solid silver;
    background: white;
    z-index: 10;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    overflow: visible;
	
}

.ProseMirror-menubar.scrolling {
	top: 47px;
}

.ProseMirror-menuitem {
    display: inline-block;
    font-size: 1.2em;
    text-align: center;
    min-width: 30px;
    line-height: 30px;
    box-sizing: border-box;
    margin: 1px;
	border-width: 1px;
    border-style: solid;
	border-color: white;
}

.ProseMirror-menuitem:hover {
    border-radius: 5px;
    background: #fcfcfc;
    border-color: #95a5a6;
    border-width: 1px;
    border-style: solid;
    box-sizing: border-box;
}

.ProseMirror-icon {
	line-height: inherit;
	vertical-align: middle;
}


.ProseMirror-menubar .fa-header-x:after {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 65%;
	vertical-align: text-bottom;
	position: relative;
	top: 2px;
}

.fa-header-1:after {
	content: "1";
}

.fa-header-2:after {
	content: "2";
}

.fa-header-3:after {
	content: "3";
}

.forceHide {
	display:none !important;
}