Adding an instrument now loads the sessions of both its Exchange and PrimaryExchange. Fixes a crash when requesting data on freshly added instruments.
Adding an instrument now loads the sessions of both its Exchange and PrimaryExchange. Fixes a crash when requesting data on freshly added instruments.

Jumaga2015/qdms,KBurov/qdms,underwater/qdms,leo90skk/qdms,qusma/qdms,underwater/qdms,leo90skk/qdms,qusma/qdms