Improve update flow

[anbraten]

Current

Currently a user has to press the Update button in the menu to get a new version. Some users are not aware that they should press that button and therefore never update leading to outdated apps.

Expected

Users normally use the latest version of the app

Suggestions

• the web-app is auto updated leading to an automatic reload when the update is installed
• the native app includes the web-app content (sth like capacitorjs) and therefore the play-store will push updates to the users
• the update button is more prominent (popup) to be definitely pressed