break categorical item into own file

src/components/categorical/value.js

@@ -0,0 +1,55 @@
+
+import { connect } from "react-redux";
+import React from "react";
+import * as globals from "../../globals";
+
+@connect((state) => {
+  return {
+    selectedMetadata: state.selectedMetadata
+  }
+})
+class CategoryValue extends React.Component {
+  render () {
+
+    /* has this value for this category already been selected? */
+    let selected = false;
+    let fontWeight;
+
+    if (!this.props.selectedMetadata) { /* there is no selected metadata */
+      selected = false;
+    } else if (
+      this.props.selectedMetadata[this.props.metadataField] && /* the key {Location: []} is present  */
+      this.props.selectedMetadata[this.props.metadataField].indexOf(this.props.value) > -1 /* "Tumor" exists in {Location: ["Tumor"]}  */
+    ) {
+      selected = true;
+    }
+
+    return (
+      <div
+        key={this.props.i}
+        onClick={selected ? this.props.toggleOff(this.props.metadataField, this.props.value) : this.props.toggleOn(this.props.metadataField, this.props.value)}
+        style={{
+          cursor: "pointer",
+          display: "flex",
+          fontWeight: selected ? 700 : 400,
+        }}>
+        <p style={{
+            width: 200,
+            flexShrink: 0,
+            margin: 0,
+            lineHeight: "1em"
+          }}>
+          {this.props.value}
+        </p>
+        <p style={{
+            margin: 0,
+            lineHeight: "1em"
+          }}>
+          {this.props.count}
+        </p>
+      </div>
+    )
+  }
+}
+
+export default CategoryValue;