Move add collection pane to React (#486)

* Move add collection pane to React

* Add feature flag

* fix unit tests

* FIx merge conflicts and address comments

* Resolve merge conflicts

* Address comments

* Fix e2e test failure

* Update test snapshots

* Update test snapshots

src/Explorer/Panes/PanelInfoErrorComponent.tsx

@@ -0,0 +1,45 @@
+import React from "react";
+import { Icon, Link, Stack, Text } from "office-ui-fabric-react";
+
+export interface PanelInfoErrorProps {
+  message: string;
+  messageType: string;
+  showErrorDetails: boolean;
+  link?: string;
+  linkText?: string;
+  openNotificationConsole?: () => void;
+}
+
+export const PanelInfoErrorComponent: React.FunctionComponent<PanelInfoErrorProps> = (
+  props: PanelInfoErrorProps
+): JSX.Element => {
+  let icon: JSX.Element;
+  if (props.messageType === "error") {
+    icon = <Icon iconName="StatusErrorFull" className="panelErrorIcon" />;
+  } else if (props.messageType === "warning") {
+    icon = <Icon iconName="WarningSolid" className="panelWarningIcon" />;
+  } else if (props.messageType === "info") {
+    icon = <Icon iconName="InfoSolid" className="panelLargeInfoIcon" />;
+  }
+
+  return (
+    <Stack className="panelInfoErrorContainer" horizontal verticalAlign="start">
+      {icon}
+      <span className="panelWarningErrorDetailsLinkContainer">
+        <Text className="panelWarningErrorMessage" variant="small">
+          {props.message}{" "}
+          {props.link && props.linkText && (
+            <Link target="_blank" href={props.link}>
+              {props.linkText}
+            </Link>
+          )}
+        </Text>
+        {props.showErrorDetails && (
+          <a className="paneErrorLink" role="link" onClick={props.openNotificationConsole}>
+            More details
+          </a>
+        )}
+      </span>
+    </Stack>
+  );
+};