Fixed: Create symlink for sieve filters on email account creation/upd…

Quote from i-MSCP Github (1.5.3)

Code

1. Fixed: Create symlink for sieve filters on email account creation/update, even when those are not available (Dovecot IMAP/POP server implementation)

Source: https://github.com/i-MSCP/imsc…c0971e3e22a3ab4b04c6c068a