Added checkbox to control the findIfExists shlink flag

src/utils/Checkbox.js

@@ -0,0 +1,32 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import classNames from 'classnames';
+import { v4 as uuid } from 'uuid';
+
+const propTypes = {
+  checked: PropTypes.bool.isRequired,
+  onChange: PropTypes.func.isRequired,
+  children: PropTypes.oneOfType([ PropTypes.string, PropTypes.node ]),
+  className: PropTypes.string,
+};
+
+const Checkbox = ({ checked, onChange, className, children }) => {
+  const id = uuid();
+
+  return (
+    <span className={classNames('custom-control custom-checkbox', className)} style={{ display: 'inline' }}>
+      <input
+        type="checkbox"
+        className="custom-control-input"
+        id={id}
+        checked={checked}
+        onChange={(e) => onChange(e.target.checked, e)}
+      />
+      <label className="custom-control-label" htmlFor={id}>{children}</label>
+    </span>
+  );
+};
+
+Checkbox.propTypes = propTypes;
+
+export default Checkbox;