Stop running services if the user wants to change provider.

**DO NOT MERGE** (yet)

If the user changes the selected provider or tries to create a new account already logged in, we ask if he wants to stop the running servers since is needed to do the change.

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Warn the user to stop services when it tries to:
- [x] change the provider in the login widget (switch provider or run wizard with 'other...' option)
- [x] create an account from the bitmask menu

and these conditions are true:

- [x] EIP running
- [x] user logged in
- [ ] EIP starting
- [ ] mail running (imap/smtp/soledad)