Tidy of components

- Moved all components into a single directory like nextjs
 - Made component names consistent with each other
 - Made component names consistent with their export class names
 - Added storybook for a few components with the aim to extend this further.

src/components/FieldSymbol.jsx

@@ -0,0 +1,27 @@
+import React from 'react'
+import PropTypes from 'prop-types'
+import FieldAutocomplete from './FieldAutocomplete'
+
+
+export default class FieldSymbol extends React.Component {
+  static propTypes = {
+    value: PropTypes.string,
+    icons: PropTypes.array,
+    style: PropTypes.object,
+    onChange: PropTypes.func.isRequired,
+  }
+
+  static defaultProps = {
+    icons: []
+  }
+
+  render() {
+    return <FieldAutocomplete
+      value={this.props.value}
+      options={this.props.icons.map(f => [f, f])}
+      onChange={this.props.onChange}
+      wrapperStyle={this.props.style}
+    />
+  }
+}
+