[Dev] Fixed a bug in the availability calculation algorithm: the availability is cascaded from the highest to the lowest booking class.
[Dev] Fixed a bug in the availability calculation algorithm: the availability is cascaded from the highest to the lowest booking class.

jwakely/airinv,airsim/airinv,jwakely/airinv,airsim/airinv,jwakely/airinv,airsim/airinv,jwakely/airinv,jwakely/airinv,jwakely/airinv,airsim/airinv,airsim/airinv,airsim/airinv,jwakely/airinv,jwakely/airinv,jwakely/airinv,airsim/airinv,airsim/airinv,airsim/airinv