Add overlay style to buttons, continue video after expanding it

app/assets/javascripts/components/components/icon_button.jsx

@@ -13,7 +13,8 @@ const IconButton = React.createClass({
     activeStyle: React.PropTypes.object,
     disabled: React.PropTypes.bool,
     inverted: React.PropTypes.bool,
-    animate: React.PropTypes.bool
+    animate: React.PropTypes.bool,
+    overlay: React.PropTypes.bool
   },
 
   getDefaultProps () {
@@ -21,7 +22,8 @@ const IconButton = React.createClass({
       size: 18,
       active: false,
       disabled: false,
-      animate: false
+      animate: false,
+      overlay: false
     };
   },
 
@@ -39,7 +41,7 @@ const IconButton = React.createClass({
     let style = {
       fontSize: `${this.props.size}px`,
       width: `${this.props.size * 1.28571429}px`,
-      height: `${this.props.size}px`,
+      height: `${this.props.size * 1.28571429}px`,
       lineHeight: `${this.props.size}px`,
       ...this.props.style
     };
@@ -48,13 +50,31 @@ const IconButton = React.createClass({
       style = { ...style, ...this.props.activeStyle };
     }
 
+    const classes = ['icon-button'];
+
+    if (this.props.active) {
+      classes.push('active');
+    }
+
+    if (this.props.disabled) {
+      classes.push('disabled');
+    }
+
+    if (this.props.inverted) {
+      classes.push('inverted');
+    }
+
+    if (this.props.overlay) {
+      classes.push('overlayed');
+    }
+
     return (
       <Motion defaultStyle={{ rotate: this.props.active ? -360 : 0 }} style={{ rotate: this.props.animate ? spring(this.props.active ? -360 : 0, { stiffness: 120, damping: 7 }) : 0 }}>
         {({ rotate }) =>
           <button
             aria-label={this.props.title}
             title={this.props.title}
-            className={`icon-button ${this.props.active ? 'active' : ''} ${this.props.disabled ? 'disabled' : ''} ${this.props.inverted ? 'inverted' : ''}`}
+            className={classes.join(' ')}
             onClick={this.handleClick}
             style={style}>
             <i style={{ transform: `rotate(${rotate}deg)` }} className={`fa fa-fw fa-${this.props.icon}`} aria-hidden='true' />