Added settings drawer with persistent settings

app/features/conference/components/Conference.js

app/features/navbar/actionTypes.js

app/features/navbar/actions.js

app/features/navbar/components/Navbar.js

app/features/navbar/components/index.js

app/features/navbar/index.js

app/features/navbar/reducer.js

app/features/navbar/styled/DrawerContainer.js

app/features/navbar/styled/index.js

app/features/redux/index.js

app/features/redux/middleware.js

app/features/redux/persistor.js

app/features/redux/reducers.js

app/features/redux/store.js

app/features/settings/actionTypes.js

app/features/settings/actions.js

app/features/settings/components/SettingsAction.js

app/features/settings/components/SettingsDrawer.js

app/features/settings/components/index.js

app/features/settings/index.js