Replace rebass with own Modal component

src/components/modals/Modal.jsx

@@ -0,0 +1,43 @@
+import React from 'react'
+
+import CloseIcon from 'react-icons/lib/md/close'
+
+import Overlay from './Overlay'
+import colors from '../../config/colors'
+import { margins } from '../../config/scales'
+
+class Modal extends React.Component {
+  static propTypes = {
+    isOpen: React.PropTypes.bool.isRequired,
+    title: React.PropTypes.string.isRequired,
+    toggleOpen: React.PropTypes.func.isRequired,
+  }
+
+  render() {
+    return <Overlay isOpen={this.props.isOpen}>
+      <div style={{
+        backgroundColor: colors.gray,
+      }}>
+        <div style={{
+          backgroundColor: colors.midgray,
+          display: 'flex',
+          flexDirection: 'row',
+          padding: margins[1]
+        }}>
+          {this.props.title}
+          <span style={{flexGrow: 1}} />
+          <a onClick={this.props.toggleOpen(false)}>
+            <CloseIcon />
+          </a>
+        </div>
+        <div style={{
+          padding: margins[1]
+        }}>
+          {this.props.children}
+        </div>
+      </div>
+    </Overlay>
+  }
+}
+
+export default Modal