[BUG] can't migrate my account

[Dehelssey]

Describe the bug
Not sure if a bug or a missing implementation but once an account is set as an alias of a new one, I can't do anything to migrate it

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Preferences'
2. Scroll down to 'Additional settings'
3. Click on "Migrate account"
4. No button or link to migrate, only to add an account as alias even though the description says "To move another account to this one, first add it as an alias here, and then go to the server where it is hosted and initiate the move."

Expected behavior
A button/link should appear on the UI to trigger the migration

Screenshots

Smartphone (please complete the following information):

• Device: Samsung s9
• OS: Android (/e/OS)
• Browser: Vivaldi
• Version: 6.9.3451.107