Cleanup shared, consistency with standards (#309)

* Cleanup shared, consistency with standards

* Re-add item

* Cleanup webpack demos

packages/ui-keyring/src/options/item.ts

@@ -0,0 +1,23 @@
+// Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { KeyringSectionOption } from './types';
+
+import { isUndefined } from '@polkadot/util';
+
+export default function createItem (address: string, _name?: string): KeyringSectionOption {
+  const name = isUndefined(_name)
+    ? (
+      (address.length > 15)
+        ? `${address.slice(0, 6)}…${address.slice(-6)}`
+        : address
+    )
+    : _name;
+
+  return {
+    key: address,
+    name,
+    value: address
+  };
+}