Currently DBeaver doesn't have MS SQL specific extension so it works with it in generic mode (using JDBC API).
In generic mode it can't edit procedures or any other database specific objects.
MS SLQ extension is in TODO but I can't yet say when exactly it will be implemented.
In fact currently I am the only active developer and there too many features in TODO

At least wee need extensions for DB2 and PostgreSQL.
I'll publish roadmap in nearest time.
Thanks!