Generate password before registration

When registering for a new service, the generation of a password could be done directly from the autofill or the magikeyboard (it would be generating the password before going through the full KeePassDX interface.). The procedure would then allow the fields to be transferred to a new entry.

Start by tracing the autofill and Magikeyboard registration flows described in the issue, then identify how generated credentials are transferred into a new KeePassDX entry. Done means a user can generate a password before opening the full interface and transfer the relevant fields into a new entry.

Written by the indexing model from the issue text.