(prettier) adding trailing commas (#647)

.prettierrc.json

packages/desktop-client/src/browser-preload.browser.js

packages/desktop-client/src/browser-server.js

packages/desktop-client/src/components/AnimatedRefresh.js

packages/desktop-client/src/components/App.js

packages/desktop-client/src/components/AppBackground.js

packages/desktop-client/src/components/Background.js

packages/desktop-client/src/components/BankSyncStatus.js

packages/desktop-client/src/components/Box.js

packages/desktop-client/src/components/Debugger.js

packages/desktop-client/src/components/FatalError.js

packages/desktop-client/src/components/FinancesApp.js

packages/desktop-client/src/components/FloatableSidebar.js

packages/desktop-client/src/components/LoggedInUser.js

packages/desktop-client/src/components/ManageRules.js

packages/desktop-client/src/components/MobileWebMessage.js

packages/desktop-client/src/components/Modals.js

packages/desktop-client/src/components/Notifications.js

packages/desktop-client/src/components/SidebarWithData.js

packages/desktop-client/src/components/Titlebar.js