Multi Profile Labels and more [active label in title bar, restore last used one on startup]

I suggest a few closely related UI updates to improve usability for users with multiple accounts.

  1. Give users a way to create/edit labels for their own accounts (e.g. “work”, “friends”, “family”)

  2. On the smartphone app show the label of the active account at the top of the screen instead of the text “Delta Chat”

  3. Have a setting to control which screen Delta Chat displays when the app is first opened after starting the device: either the chats of the account which was active the last time Delta Chat was used (current behavior) or the account switcher screen

meanwhile, you can add labels to each profile:

having additional settings to control which is opened, is not really in the genes of Delta Chat, where we try to avoid options in general, and on that level of detail in special, so this will very likely not come. but: the last profile is opened - and on sharing/forwarding to Delta Chat you meanwhile have options to switch the profile as well