We're introducing a new menu (https://www.figma.com/file/a1nkbWgbgjRlrOY9LVurTz/Comm-%2F-Desktop-app?node-id=1272%3A88750) that looks exactly like AppSwitcher. In order to do that, we're going to create a reusable component that renders such a menu. To make review process easier, I'm starting with renaming the concrete component to what will be a reusable component, so that it's obvious what will be kept and what will be moved to the concrete implementation.
Depends on D3337

Use AppSwitcher to change between chat and calendar and check if it works correctly.