opnsense-docs

system/trust: Fix typo in self-signed-chain.rst (#778)

System: Trust: Settings - add some more context for "Store intermediate" toggle, clsoes https://github.com/opnsense/docs/issues/773

Revert "how-tos/self-signed-chain - fix menu link and method, closes https://github.com/opnsense/docs/pull/762"

development: some context about the SSO flow, for https://github.com/opnsense/docs/issues/745

mvc: add persisted_at attribute in cretaing models, for https://github.com/opnsense/docs/issues/745