Password encryption limitations

[jas88]

Describe the bug

Current password encryption is sub-optimal - direct RSA encryption limits password length and is poor practice cryptographically.

To Reproduce

Add an external data source (e.g. database server) with a long (50+?) character password - saving this fails semi-silently.

Expected behavior

Passwords of arbitrary length should be securely encrypted (probably using a random AES256 key, with that key in turn RSA-encrypted and stored alongside).

Screenshots

RDMP Version

All current releases.

Error with Stack Trace

If applicable, paste the entire stack trace here, leave the triple quotes (```)

Database Engine
Sql Server, Oracle, MySql or Postgres.

Additional context
Add any other context about the problem here.