add AlertModal component and update styling of delete confirmations

src/components/AlertModal.jsx

@@ -0,0 +1,28 @@
+import React from 'react';
+
+import {
+  Modal
+} from '@patternfly/react-core';
+
+import { ExclamationTriangleIcon, ExclamationCircleIcon, InfoCircleIcon, CheckCircleIcon } from '@patternfly/react-icons';
+
+const getIcon = (variant) => {
+  let icon;
+  if (variant === 'warning') {
+    icon = (<ExclamationTriangleIcon className="at-c-alertModal__icon" />);
+  } else if (variant === 'danger') {
+    icon = (<ExclamationCircleIcon className="at-c-alertModal__icon" />);
+  } if (variant === 'info') {
+    icon = (<InfoCircleIcon className="at-c-alertModal__icon" />);
+  } if (variant === 'success') {
+    icon = (<CheckCircleIcon className="at-c-alertModal__icon" />);
+  }
+  return icon;
+};
+
+export default ({ variant, children, ...props }) => (
+  <Modal className={`awx-c-modal${variant && ` at-c-alertModal at-c-alertModal--${variant}`}`} {...props}>
+    {children}
+    {getIcon(variant)}
+  </Modal>
+);