[New Viz] Partition Diagram (#3642)

* Added Partition Visualization

* added unit tests

superset/assets/javascripts/components/OptionDescription.jsx

@@ -0,0 +1,28 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+
+import InfoTooltipWithTrigger from './InfoTooltipWithTrigger';
+
+const propTypes = {
+  option: PropTypes.object.isRequired,
+};
+
+// This component provides a general tooltip for options
+// in a SelectControl
+export default function OptionDescription({ option }) {
+  return (
+    <span>
+      <span className="m-r-5 option-label">
+        {option.label}
+      </span>
+      {option.description &&
+        <InfoTooltipWithTrigger
+          className="m-r-5 text-muted"
+          icon="question-circle-o"
+          tooltip={option.description}
+          label={`descr-${option.label}`}
+        />
+      }
+    </span>);
+}
+OptionDescription.propTypes = propTypes;